Pulley Block

See More About:    Brooch Fibula        Bird Ornies        Antique Hand        

ConfidenceAntique Hand Tools & PayPal encourages members to become Verified to increase trust and safety in our community. Because financial institutions screen their account holders, PayPal"s Verification process increases security when you pay parties you do not know.

Frequently Asked Questions...

what is the tension in the cord at the right?

three blocks attached by cords that loop over frictionless pulleys. Block B lies on a frictionless table; the masses are mA = 4.90 kg, mB = 9.40 kg, and mC = 13.0 kg. When the blocks are released, what is the tension in the cord at the right?


Best Answer...

Answer:

The blocks are attached. So the experience the same displacement , move at the same velocity and undergo the same acceleration in the direction the can move.
Set up the instationary force balance for each block:, with the tensions in the cord acting as drag force on the block

Block A at the left moves upwards, dragged by the rope T_AB, while gravity acts downwards. Hence
m_A · a = T_AB - m_A · g
=>
The tension in the cord between A and B is
T_AB = m_A · (a + g)

Block B in the middle moves to the right, left moves upwards, dragged by the rope T_AB, while gravity acts downwards:
m_B · a = T_BC - T_AB
=>
With tension AB from above
m_B · a = T_BC - m_A · (a + g)
The acceleration of the blocks is:
=>
a = (T_BC - m_A · g)) / (m_a + m_B)

Block C at the right moves downwards, dragged by the rope T_AC, while gravity acts downwards. Hence
m_C · a = m_C · g - T_BC
=>
with acceleration from above
m_C · (T_BC - m_A · g)) / (m_a + m_B) = m_C · g - T_BC
<=>
m_C · (T_BC - m_A · g)) = (m_C · g - T_BC ) ·(m_a + m_B)

Solve for the tension at the cord to the right T_BC:

T_BC = m_C · g · (2·m_a + m_B) / (m_A + m_B + m_C)
= 13kg · 9.81m/s² · (2·4.9kg + 9.4kg) / (4.9kg + 9.4kg + 13kg)
= 89.7N

Vintage BLOCK AND TACKLE Triple and Double Pulleys Hooks  Original 80 Rope
vintage block and tackle triple and double pulleys hooks original 80 rope
$29.99
quality
Western Block Company Pulley
western block company pulley
$20.00
quality
Block And Tackle Pulley W star Wood Metal Antique
block and tackle pulley w star wood metal antique
$11.95
quality
WOODEN PULLEY BLOCK AND TACKLE BARN NAUTICAL VINTAGE ANTIQUE
wooden pulley block and tackle barn nautical vintage antique
$6.99
quality
RARE Large Vintage Red Oak  Steel Block and Tackle Pulley w Hasp Opening
rare large vintage red oak steel block and tackle pulley w hasp opening
$150.00
quality
Vintage Industrial Block Tackle Pulley Steel Chain Hoist Wheel Metal Art 403902D
vintage industrial block tackle pulley steel chain hoist wheel metal art 403902d
$5.99
quality
Old Vintage Boston  Lockport Block Co Pulley and Rope Made in USA
old vintage boston lockport block co pulley and rope made in usa
$19.99
quality
BARN BLOCK AND TACKLE PULLEY CAST IRON  WOOD SINGLE SHEAVE ORNATE 7 TALL
barn block and tackle pulley cast iron wood single sheave ornate 7 tall
$24.95
quality
BARN BLOCK AND TACKLE PULLEY CAST IRON  WOOD SINGLE SHEAVE NAUTICAL 12 TALL
barn block and tackle pulley cast iron wood single sheave nautical 12 tall
$49.95
quality
BARN BLOCK AND TACKLE PULLEY CAST IRON  WOOD SINGLE SHEAVE 10 half  TALL MYERS
barn block and tackle pulley cast iron wood single sheave 10 half tall myers
$49.95
quality
BARN BLOCK  TACKLE PULLEY CAST IRON WOOD SINGLE SHEAVE HUGE 14 half  TALL
barn block tackle pulley cast iron wood single sheave huge 14 half tall
$99.95
quality
ANTIQUE VINTAGE IRON BLOCK  TACKLE WOOD PULLEY NAUTICAL
antique vintage iron block tackle wood pulley nautical
$13.50
quality
Yale Lock Mfg Co Pulley Blocks Booklet
yale lock mfg co pulley blocks booklet
$22.46
quality
Vintage Block Tackle Hay Pulley LQQK
vintage block tackle hay pulley lqqk
$14.99
quality
Antique Snatch Block Pulley w Hook
antique snatch block pulley w hook
$15.99
quality
OLD RUSTIC UW BLOCK  TACKLE WOOD  METAL GREEN PULLEY PRIMATIVE ART DECO BARN
old rustic uw block tackle wood metal green pulley primative art deco barn
$15.00
quality
Large Cast Iron Industrial Age Pulleys w Brake Vintage Block  Tackle 1905
large cast iron industrial age pulleys w brake vintage block tackle 1905
$49.95
quality
VINTAGE WOODEN PULLEY BLOCK AND TACKLE
vintage wooden pulley block and tackle
$12.50
quality
Antique 1 Wheel Pulley Block  Tackle Hook Single Wood Hay Barn Farm Nautical
antique 1 wheel pulley block tackle hook single wood hay barn farm nautical
$30.00
quality
Large Antique Vintage Double U W Block  Tackle Pulley
large antique vintage double u w block tackle pulley
$35.00
quality
Vintage Wood Double Pulley Block  Tackle
vintage wood double pulley block tackle
$25.00
quality
Vintage wooden block and tackle pair double pulley
vintage wooden block and tackle pair double pulley
$174.95
quality
Vintage 2 Wheel Steel Barn Pulleys Block Tackle Pully Hook
vintage 2 wheel steel barn pulleys block tackle pully hook
$12.00
quality
STEEL 3 BLOCK pulley W frame and mount heavy duty hoist wheel pulley
steel 3 block pulley w frame and mount heavy duty hoist wheel pulley
$55.00
quality
Antique Vintage Wood  Cast Iron Block  Tackle Triple Pulley
antique vintage wood cast iron block tackle triple pulley
$80.00
quality
Antique Boston  Lockport Block Co Double Wooden Iron Block  Tackle Pulley RARE
antique boston lockport block co double wooden iron block tackle pulley rare
$19.99
quality
Antique Boston  Lockport Block Co Double Wooden Iron Block  Tackle Pulley RARE
antique boston lockport block co double wooden iron block tackle pulley rare
$19.99
quality
Antique Unsigned Single Pulley Wooden Iron Block  Tackle Some old red paint
antique unsigned single pulley wooden iron block tackle some old red paint
$19.99
quality
Myers OK H 298 vintage pulley primitive rustic barn block and tackle
myers ok h 298 vintage pulley primitive rustic barn block and tackle
$13.83
quality
antique metal 2 wheel pulley block
antique metal 2 wheel pulley block
$10.00
quality
OLD WOOD WHEEL RED CAST IRON BLOCK TACKLE VTG FARM BARN PRIMITIVE ROPE PULLEY
old wood wheel red cast iron block tackle vtg farm barn primitive rope pulley
$39.99
quality
Vintage Block And Tackle Double Steel Rope Pulley 2 quarter  Metal
vintage block and tackle double steel rope pulley 2 quarter metal
$4.99
quality
Lot of 2 Antique Wooden Cast Iron Block and Tackle Barn Pulleys Starline l
lot of 2 antique wooden cast iron block and tackle barn pulleys starline l
$39.95
quality
VINTAGE 10 METAL BLOCK AND TACKLE PULLEY AMISH FARM FIND WORKS GREAT LOOK
vintage 10 metal block and tackle pulley amish farm find works great look
$9.99
quality
Antique Vintage Large Wood Single Pulley Block  Cast Iron Hook Barn   lh
antique vintage large wood single pulley block cast iron hook barn lh
$14.99
quality
Vintage Myers OK Wood and Iron Block Pulley No H310B
vintage myers ok wood and iron block pulley no h310b
$8.75
quality
Large 21 Vintage Wood  Cast Iron Block  Tackle Pulley Barn Decor
large 21 vintage wood cast iron block tackle pulley barn decor
$120.00
quality
ANTIQUE CAST IRON  WOOD PULLEY BLOCK TACKLE ANVIL BRAND RUSTIC PRIMITIVE
antique cast iron wood pulley block tackle anvil brand rustic primitive
$24.99
quality
Vintage Wood  Metal Double Pulley Block
vintage wood metal double pulley block
$19.99
quality
Lot of 6 Antique Small Brass  Steel Rope Flag Pole Block  Tackle Pulleys
lot of 6 antique small brass steel rope flag pole block tackle pulleys
$10.49
quality
Triple Block Tackle Barn Pulley Wood  Iron Makers Mark
triple block tackle barn pulley wood iron makers mark
$99.99
quality
Antique Vintage 2 Wheel Wood  Metal Block  Tackle Pulley Farm Feed Barn Hook
antique vintage 2 wheel wood metal block tackle pulley farm feed barn hook
$16.00
quality
3 Wood Wheel Block  Tackle Pulley 13 half  7 Hook Vintage Antique Barn Hay Art
3 wood wheel block tackle pulley 13 half 7 hook vintage antique barn hay art
$22.00
quality
Antique 2 Sheave Snatch Block  Tackle Rope Fence Stretcher Pulley Farm Tool
antique 2 sheave snatch block tackle rope fence stretcher pulley farm tool
$9.99
quality
Restored Vintage Star 4 block  tackle Pulleys
restored vintage star 4 block tackle pulleys
$58.79
quality
SET OF 4 ANTIQUE WOOD BLOCK IRON STEEL FARM INDUSTRIAL SHIP BARN PULLEYS DECOR
set of 4 antique wood block iron steel farm industrial ship barn pulleys decor
$64.99
quality
Antique Original Wood Block and Tackle Vintage Barn Farm Boat Pulleys Hooks 3
antique original wood block and tackle vintage barn farm boat pulleys hooks 3
$74.99
quality
Vintage Block And Tackle With Rope Barn Pulley Steampunk
vintage block and tackle with rope barn pulley steampunk
$25.00
quality
2 Vintage Beard Wood  Cast Iron Barn Boat Hook  Pulley Block  Tackle Working
2 vintage beard wood cast iron barn boat hook pulley block tackle working
$24.99
quality
Antique Primitive Americana Barn Nautical Wooden Pulley w Hook Block
antique primitive americana barn nautical wooden pulley w hook block
$22.99
quality
Lot of 2 UNKNOWN Vintage Block  Tackle Pulleys
lot of 2 unknown vintage block tackle pulleys
$19.99
quality
Vintage Galvanized Cast Iron BLOCK Single WHEEL PULLEY half rope 2 half  dia tool
vintage galvanized cast iron block single wheel pulley half rope 2 half dia tool
$16.00
quality
Vintage 6 BLOCK Tackle Single WHEEL PULLEY hook latch open 13 long 3 dia tool
vintage 6 block tackle single wheel pulley hook latch open 13 long 3 dia tool
$27.00
quality
VINTAGE BUTLER KWIK LIFT CO ROPE PULLEY CAST IRON STEEL BLOCK TACKLE BARN
vintage butler kwik lift co rope pulley cast iron steel block tackle barn
$19.99
quality
ANTIQUE RUSTIC SINGLE WOOD SNATCH BLOCK BARN PULLEY AND CAST IRON HOOK
antique rustic single wood snatch block barn pulley and cast iron hook
$7.99
quality
Vintage Block Tackle Single Sheave Wood Metal Sheave Hook
vintage block tackle single sheave wood metal sheave hook
$24.98
quality
antique block 12 inch barn pulley cast iron pulley industrial hay loading well
antique block 12 inch barn pulley cast iron pulley industrial hay loading well
$39.00
quality
pulley cast iron wood tool block and tackle hay loft VINTAGE OLD FARM JMJ
pulley cast iron wood tool block and tackle hay loft vintage old farm jmj
$39.99
quality
ANTIQUE PRIMITIVE TOOL WOOD WITH WOODEN WHEEL BARN SHOP PULLEY BLOCK AND TACKLE
antique primitive tool wood with wooden wheel barn shop pulley block and tackle
$28.50
quality
PACIFIC 6 F ANTIQUE VINTAGE PULLEY  BLOCK AND TACKLE
pacific 6 f antique vintage pulley block and tackle
$99.99
quality
ANTIQUE PRIMITIVE TOOL WOOD WITH WOODEN WHEEL BARN SHOP PULLEY BLOCK AND TACKLE
antique primitive tool wood with wooden wheel barn shop pulley block and tackle
$28.50
quality
Vintage Used Old Wood Metal Block  Tackle Pulley Hook Industrial Nautical
vintage used old wood metal block tackle pulley hook industrial nautical
$49.99
quality
nice Vintage Block  tackle wood cast iron Pulley and Hook farm barn boat ship
nice vintage block tackle wood cast iron pulley and hook farm barn boat ship
$19.95
quality
LARGE ANTIQUE WOODEN PULLEY WOODEN BLOCK AND TACKLEFROM OLD BARN
large antique wooden pulley wooden block and tacklefrom old barn
$35.00
quality
OLD VINTAGE WOOD FARM BARN TOOL BLOCK  TAKCLE PULLEY ANTIQUE PRIMITIVE HAY
old vintage wood farm barn tool block takcle pulley antique primitive hay
$44.10
quality
Antique Double Wooden Pulley Block And Tackle With Steel Hook  Ring  Auger
antique double wooden pulley block and tackle with steel hook ring auger
$19.00
quality
Large Vintage Wood Block  Tackle Double Ship Pulley Barn Pulley Heavy Rustic
large vintage wood block tackle double ship pulley barn pulley heavy rustic
$60.00
quality
Western Crosby Snatch Block Pulley Wood Metal with Large Hook 16
western crosby snatch block pulley wood metal with large hook 16
$29.99
quality
Old VTG Pair Block Tackle Pulley Wheel Steampunk Industrial Hardware Set Lot
old vtg pair block tackle pulley wheel steampunk industrial hardware set lot
$29.00
quality
Antique Block and Tackle Pulleys
antique block and tackle pulleys
$39.80
quality
Vintage Wood Iron Pulley Block Tackle Primitive Tool Antique Nautical Barn fl
vintage wood iron pulley block tackle primitive tool antique nautical barn fl
$25.00
quality
Large Vintage Wood Block and Tackle Double Ship Pulley Barn Pulley 3 4 in rope
large vintage wood block and tackle double ship pulley barn pulley 3 4 in rope
$49.99
quality
Vintage Farm Pulley  WESTERN BLOCK CO LOCKPORT NY Wood  steel Sweet patina
vintage farm pulley western block co lockport ny wood steel sweet patina
$27.50
quality
THERN MACHINE CAST BLOCK AND TACKLE PULLEY 2000 LB CAPACITY
thern machine cast block and tackle pulley 2000 lb capacity
$79.99
quality
Massive Vintage WOODEN BLOCK  TACKLE Single PULLEY Amazing Two Feet Long
massive vintage wooden block tackle single pulley amazing two feet long
$95.00
quality
Antique Vintage Cast Iron Double Block Pulley Old Farm Tool Rustic Primitive
antique vintage cast iron double block pulley old farm tool rustic primitive
$15.00
quality
vintage wood block and tackle pulley anvil nautical decor industrial salvage
vintage wood block and tackle pulley anvil nautical decor industrial salvage
$15.00
quality
vintage wood block and tackle pulley anvil nautical decor industrial salvage
vintage wood block and tackle pulley anvil nautical decor industrial salvage
$20.00
quality
ANTIQUE WOOD  IRON DOUBLE PULLEY for BLOCK AND TACKLE OLD ORIGINAL
antique wood iron double pulley for block and tackle old original
$34.95
quality
Vintage Block and Tackle Pulley Farm Tools 15 long 5 diameter Wheel
vintage block and tackle pulley farm tools 15 long 5 diameter wheel
$19.00
quality
Old Vtg Block Tackle Dual Pulley Set Steel Metal Hardware Work Equipment Tool
old vtg block tackle dual pulley set steel metal hardware work equipment tool
$29.99
quality
Vintage Wood Block  Tackle Pulley 5 WHEEL ROLLER BUSHED
vintage wood block tackle pulley 5 wheel roller bushed
$17.99
quality
Antique Heavy Duty Vintage Hook Pulley Snatch Block Rustic Barn Decor
antique heavy duty vintage hook pulley snatch block rustic barn decor
$24.99
quality
Antique Vintage Double Hook Pulley Snatch Block Rustic Barn Decor
antique vintage double hook pulley snatch block rustic barn decor
$19.99
quality
Antique Double Hook Double Wheel Pulley Snatch Block Rustic Barn Decoc
antique double hook double wheel pulley snatch block rustic barn decoc
$19.99
quality
Antique Pulley Snatch Block Rustic Barn Decoc
antique pulley snatch block rustic barn decoc
$14.99
quality
ANTIQUE  6 ANVIL DOUBLE WOOD  METAL SHEAVE PULLEY FARM BLOCK  TACKLE HAY
antique 6 anvil double wood metal sheave pulley farm block tackle hay
$15.99
quality
VINTAGE AMERICAN CHAIN  CABLE CO 4110 half CHAIN DOUBLE PULLEY BLOCK half TON
vintage american chain cable co 4110 half chain double pulley block half ton
$27.99
quality
Vintage Antique Farm Barn Nautical 2 Pulley Wood Block  Tackle Double Pulleys
vintage antique farm barn nautical 2 pulley wood block tackle double pulleys
$39.95
quality
Vintage Antique Block Tackle Single Pulley with Cast Iron Hook
vintage antique block tackle single pulley with cast iron hook
$19.95
quality
Antique Boston  Lockport Block Co Double Wooden Iron Block  Tackle Pulley RARE
antique boston lockport block co double wooden iron block tackle pulley rare
$29.99
quality
LARGE VINTAGE ANTIQUE METAL  WOOD PULLEY BLOCK AND TACKLE STEAMPUNK INDUSTRIAL
large vintage antique metal wood pulley block and tackle steampunk industrial
$13.99
quality
LARGE VINTAGE BLOCK AND TACKLE PULLEY HOOK MARITIME DECOR ANCHOR LOGO FARM SHIP
large vintage block and tackle pulley hook maritime decor anchor logo farm ship
$9.99
quality
Vintage Antique Block Tackle Single Pulley with Cast Iron Hook  Wheel Decor
vintage antique block tackle single pulley with cast iron hook wheel decor
$11.77
quality
Western Block Co Lockport NY Wooden Pulley Block Desk Organizer Decoration
western block co lockport ny wooden pulley block desk organizer decoration
$14.95
quality
Vintage red single pulley loft man cave primitive industial block tackle nautica
vintage red single pulley loft man cave primitive industial block tackle nautica
$18.99
quality
Boat or Barn Block and Tackle Pulley Antique
boat or barn block and tackle pulley antique
$12.00
quality
DURBIN DURCO ST LOUIS MO FENCE STRETCHER BLOCK AND TACKLE PULLEYS LOT BB
durbin durco st louis mo fence stretcher block and tackle pulleys lot bb
$16.99
quality
DURBIN DURCO ST LOUIS MO FENCE STRETCHER BLOCK AND TACKLE PULLEYS LOT AA
durbin durco st louis mo fence stretcher block and tackle pulleys lot aa
$19.99
quality
2 VINTAGE WOODEN PULLEY BTC texas star BLOCK + TACKLE Barn Rope 03E2
2 vintage wooden pulley btc texas star block + tackle barn rope 03e2
$149.99
quality

Vintage Maritime Double Wood Pulley Block  Tackle Hook 12
vintage maritime double wood pulley block tackle hook 12
$25.00
quality
VINTAGE 13 DOUBLE WOOD WOODEN PULLEY NAUTICAL SHIP FARM BLOCK
vintage 13 double wood wooden pulley nautical ship farm block
$125.00
quality
ANTIQUE VINTAGE SINGLE PULLEY BLOCK HOOK PULLEY Repurpose Lamp Hanging TACKLE
antique vintage single pulley block hook pulley repurpose lamp hanging tackle
$28.00
quality
Antique Sailboat Ship Bronze  Wood DOUBLE BLOCK PULLEY with 2 Swivel Hooks
antique sailboat ship bronze wood double block pulley with 2 swivel hooks
$45.00
quality
Heavy Duty Industrial Block and Tackle Double Wheel Pulley System with Hook
heavy duty industrial block and tackle double wheel pulley system with hook
$46.00
quality
Antique shipbuilding marine double block pulley industrial farm interest piece
antique shipbuilding marine double block pulley industrial farm interest piece
$38.00
quality
Old Wooden Block Tackle Pulley Iron Wheel 1336 Western Nautical decor
old wooden block tackle pulley iron wheel 1336 western nautical decor
$99.99
quality
Large 6 Graphite Bronze Sailing boat block tackle
large 6 graphite bronze sailing boat block tackle
$29.95
quality
Vintage Maritime Double Wood Block Pulley  Iron Tackle Nautical Hook 12
vintage maritime double wood block pulley iron tackle nautical hook 12
$22.99
quality
LARGE ANTIQUE NAUTICAL DOUBLE BLOCK AND TACKLE PULLEY SET WOOD WROUGHT IRON OLD
large antique nautical double block and tackle pulley set wood wrought iron old
$39.99
quality
Antique Hooked Block and Tackle All Metal Nautical Functioning
antique hooked block and tackle all metal nautical functioning
$20.00
quality
Antique Heavy Duty Pulley Chain Block  Tackle Industrial Steampunk Vintage
antique heavy duty pulley chain block tackle industrial steampunk vintage
$25.00
quality
NAUTICAL TABLE LAMP WOOD BLOCK PULLEY BRONZE ANCHOR CUSTOM MADE WITH SHADE
nautical table lamp wood block pulley bronze anchor custom made with shade
$25.00
quality
Bronze boat hardware Bronze Blocks
bronze boat hardware bronze blocks
$75.00
quality
5 half  INCH WOOD WHEEL PULLEY BLOCK AND TACKLE PULLY FULLY FUNCTIONAL
5 half inch wood wheel pulley block and tackle pully fully functional
$40.00
quality
Antique wooden block with wooden pulleysolid block of woodnautical or farming
antique wooden block with wooden pulleysolid block of woodnautical or farming
$125.00
quality
Antique Nautical Ship Pulley  W H Mcmillans Sons Wood Block And Tackle System
antique nautical ship pulley w h mcmillans sons wood block and tackle system
$169.99
quality
shlf44 ANTIQUE S TRIPLE WOOD  METAL PULLEY FARM BLOCK TACKLE HAY MARINE
shlf44 antique s triple wood metal pulley farm block tackle hay marine
$39.00
quality
LEMCO BRONZE BRASS TROLLING PULLEY BLOCK FOR FISHING BOAT 6 INCH
lemco bronze brass trolling pulley block for fishing boat 6 inch
$50.00
quality
Antique Nautical Ship Block and Tackle Rope Pulley wtth Hook Maritime or Farm
antique nautical ship block and tackle rope pulley wtth hook maritime or farm
$25.00
quality
BARN HAY LOFT UW Wooden cast iron pulley 6PB nautical barn block and tackle
barn hay loft uw wooden cast iron pulley 6pb nautical barn block and tackle
$60.00
quality
MARITIME WOOD IRON PULLEY BLOCK AND TACKLE FOR SAIL BOAT ETC
maritime wood iron pulley block and tackle for sail boat etc
$51.96
quality
2 Vintage Wood Block Pulleys Nautical Ship Barn Farm Larger marked stamped Myers
2 vintage wood block pulleys nautical ship barn farm larger marked stamped myers
$27.00
quality
VINTAGE ANVEL TRIPLE PULLEY block and tackle WOOD Pulley nautical
vintage anvel triple pulley block and tackle wood pulley nautical
$45.00
quality

Didn"t find what your looking for? Search our real time inventory below...

Pulley Block

See More About:    Antique Ice        Very Good        Area Rug        
Rope and Pulley Systems: Segment 6 - The Block and Tackle - 4:1 and 5:1.pds.m2ts

Other Items People View After These Listings About