Pulley Block

See More About:    Corn Sheller        Sterling Silver        Roman Belt        

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 pulley
vintage block and pulley
$9.50
quality
Vintage Pulley Antique Wooden Farm Tool Primitive Block  Tackle Double Wheel
vintage pulley antique wooden farm tool primitive block tackle double wheel
$14.45
quality
Vintage Pulley Wood Double Block and Tackle Cast Iron Hook Barn Pully
vintage pulley wood double block and tackle cast iron hook barn pully
$20.00
quality
Vintage DUNLAP BLOCK  TACKLE DOUBLE PULLEYS HOOKS  25FT ROPE OLD FARM TOOL
vintage dunlap block tackle double pulleys hooks 25ft rope old farm tool
$19.00
quality
WOOD BLOCK PULLEY ALL WOOD PULLEY HAY MOW ROPE  ANTIQUE BLOCK
wood block pulley all wood pulley hay mow rope antique block
$78.00
quality
WOOD BLOCK W METAL PULLEY HAY MOW ROPE  ANTIQUE BLOCK  TACKLE M 25
wood block w metal pulley hay mow rope antique block tackle m 25
$48.00
quality
Vintage Block And Tackle Pulley
vintage block and tackle pulley
$10.00
quality
VINTAGE WOOD CAST IRON BLOCK  TACKLE PULLEY LOUDEN A23 FARM HAY BALE ANTIQUE
vintage wood cast iron block tackle pulley louden a23 farm hay bale antique
$30.00
quality
SKOOKUM SNATCH BLOCK PULLEY A6 HEAVY DUTY LOGGING
skookum snatch block pulley a6 heavy duty logging
$50.00
quality
Vintage Block And Tackle Pulley
vintage block and tackle pulley
$11.00
quality
Vintage Antique Metal Pulley Block Anvil Logo 3 3 Line
vintage antique metal pulley block anvil logo 3 3 line
$7.99
quality
Vintage Antique Metal Pulley Block Star Logo 3 3 Line
vintage antique metal pulley block star logo 3 3 line
$7.99
quality
Vintage Antique Metal Pulley Block Star Logo 5 2 Line
vintage antique metal pulley block star logo 5 2 line
$7.99
quality
Vintage Antique Metal Pulley Block Star Logo 3 2 Line
vintage antique metal pulley block star logo 3 2 line
$7.99
quality
Vintage Antique Metal Pulley Block Anvil Logo 5 1 Line
vintage antique metal pulley block anvil logo 5 1 line
$7.99
quality
Vintage Rope Cable Pulley Block  Tackle Barn Rustic Farm
vintage rope cable pulley block tackle barn rustic farm
$1.04
quality
DOUBLE SHEAVE DOUBLE PULLEY CRANE BLOCK W CROSBY LAUGHLIN HOOK
double sheave double pulley crane block w crosby laughlin hook
$1,500.00
quality
ANTIQUE METAL PULLEY BLOCK AND TACKLE HOIST
antique metal pulley block and tackle hoist
$0.99
quality
Vintage Block  Tackle Pulley Medium Duty Overall 8 3 4 x 3 x 2 quarter
vintage block tackle pulley medium duty overall 8 3 4 x 3 x 2 quarter
$12.99
quality
Block Tackle Steel Iron Rope Hoist Pulley w Bracket Sailing Decor Tool
block tackle steel iron rope hoist pulley w bracket sailing decor tool
$35.00
quality
WOOD  IRON DOUBLE PULLEY BLOCK  TACKLE ANTIQUE BARN INDUSTRIAL NICE SHAPE
wood iron double pulley block tackle antique barn industrial nice shape
$39.95
quality
Antique BLOCK and TACKLE Farm Iron Industrial VTG Pulley Industrial Steam Punk
antique block and tackle farm iron industrial vtg pulley industrial steam punk
$34.95
quality
Antique Double Roller Block  Tackle Pulley 21x6x5 18lbs farm ship maritime
antique double roller block tackle pulley 21x6x5 18lbs farm ship maritime
$79.95
quality
BIG Antique Western Block Co Wood and Iron Barn or Industry Triple Pulley
big antique western block co wood and iron barn or industry triple pulley
$120.00
quality
Vintage Cast Iron Double Pulley Block Primitive farm tool
vintage cast iron double pulley block primitive farm tool
$8.75
quality
Antique Double Pulley Block 4x6 BL Steel Barn Farm Hay Halyard VtgIron Hook
antique double pulley block 4x6 bl steel barn farm hay halyard vtgiron hook
$19.00
quality
LARGE VINTAGE WOOD  METAL BLOCK AND TACKLE WITH DOUBLE PULLEYS
large vintage wood metal block and tackle with double pulleys
$14.00
quality
Triple Block Tackle Barn Pulley Wood  Iron Makers Mark
triple block tackle barn pulley wood iron makers mark
$99.99
quality
VTG Large Antique Wooden Double PulleyCast Iron Hook  Wheel Western Block Co
vtg large antique wooden double pulleycast iron hook wheel western block co
$44.85
quality
Vintage Boston  Lockport  41 Snatch Block Tackle Pulley  Hook Farm Ranch Tool
vintage boston lockport 41 snatch block tackle pulley hook farm ranch tool
$44.95
quality
Antique Wood Block  Tackle Pulley Nautical Decor Barn Metal LARGE
antique wood block tackle pulley nautical decor barn metal large
$29.99
quality
Large Vintage 10 Pulley Western Block Co for Farm or Industrial Use c1940s
large vintage 10 pulley western block co for farm or industrial use c1940s
$49.99
quality
6 UW Wood Block and Tackle Pulley System w Rope Double Pulleys Vintage
6 uw wood block and tackle pulley system w rope double pulleys vintage
$355.55
quality
2 SINGLE WHEEL SWIVEL PULLEY BLOCK PULLEYS SNATCH HEAVY DUTY STEEL SWIVELING
2 single wheel swivel pulley block pulleys snatch heavy duty steel swiveling
$18.79
quality
Vintage Boston  Lockport Block Tackle Wood Pulley with Iron Hook
vintage boston lockport block tackle wood pulley with iron hook
$10.50
quality
pulley cast iron wood tool block and tackle hay loft VINTAGE PIECE
pulley cast iron wood tool block and tackle hay loft vintage piece
$8.00
quality
Vintage Barn Pulley Block and Tackle Rope Pully hook
vintage barn pulley block and tackle rope pully hook
$21.99
quality
Vintage Barn Pulley 1149 Block and Tackle Rope Pully hook
vintage barn pulley 1149 block and tackle rope pully hook
$21.99
quality
Vintage Metal Pulley Block
vintage metal pulley block
$5.00
quality
Vintage Wooden Block And Tackle Pulley Barn Find
vintage wooden block and tackle pulley barn find
$19.99
quality
Vintage Rustic Single Wooden Iron Block  Tackle Pulley
vintage rustic single wooden iron block tackle pulley
$19.99
quality
Vintage Wooden Block and Tackle Double Pulley
vintage wooden block and tackle double pulley
$25.00
quality
Vintage Anvil Double Wood and Metal Block  Tackle 4 Pulley Cast Iron
vintage anvil double wood and metal block tackle 4 pulley cast iron
$29.99
quality
VERY NICE STAR MARKING ANTIQUE WOODEN AND METAL STARLINE PULLEY SHEAVE BLOCK
very nice star marking antique wooden and metal starline pulley sheave block
$15.00
quality
Antique Pair BLOCK and TACKLE Farm Iron Industrial Pulley Industrial Steam Punk
antique pair block and tackle farm iron industrial pulley industrial steam punk
$1.99
quality
Vintage Double metal pulley Block and Tackle
vintage double metal pulley block and tackle
$12.50
quality
Vintage Barn Pulley V31 Block and Tackle Rope Pully hook Deer Camp Steampunk
vintage barn pulley v31 block and tackle rope pully hook deer camp steampunk
$24.99
quality
BLOCK 6 quarter INCH ROPE PULLEY IRON WOOD ANTIQUE WOOD HOUSING TOP RING
block 6 quarter inch rope pulley iron wood antique wood housing top ring
$9.99
quality
BLOCK 7 half INCH ROPE PULLEY IRON AND WOOD ANTIQUE OVAL WOOD HOUSING
block 7 half inch rope pulley iron and wood antique oval wood housing
$9.99
quality
Block and Tackle w Rope Nautical Barn Farm Antique Pulley Industrial Red Metal
block and tackle w rope nautical barn farm antique pulley industrial red metal
$39.00
quality
pulley cast iron wood tool block and tackle hay loft VINTAGE PIECE
pulley cast iron wood tool block and tackle hay loft vintage piece
$14.95
quality
Block and Tackle Rope Nautical Barn Farm Vintage Double Pulleys Boston Lockport
block and tackle rope nautical barn farm vintage double pulleys boston lockport
$114.95
quality
LARGE VINTAGE WOOD  METAL BLOCK AND TACKLE WITH DOUBLE PULLEYS
large vintage wood metal block and tackle with double pulleys
$15.00
quality
Vintage Wood Wooden and Metal Pulley Block and Tackle Cast Iron Hook
vintage wood wooden and metal pulley block and tackle cast iron hook
$14.99
quality
HABA 4811 Block and Tackle Toy Pulley System Flaschenzug
haba 4811 block and tackle toy pulley system flaschenzug
$49.99
quality
vintage Durbin Durco Barb Wire Fence Stretcher Block  Tackle Pulley St Louis
vintage durbin durco barb wire fence stretcher block tackle pulley st louis
$18.00
quality
old farm tool STEEL pulley cast iron fram block and tackle hay loft jmj
old farm tool steel pulley cast iron fram block and tackle hay loft jmj
$45.00
quality
Antique Vintage Large Heavy Double Wood Block Pulley
antique vintage large heavy double wood block pulley
$15.00
quality
VINTAGE RUSTIC 8 TON SNATCH BLOCK CAST IRON PULLEY REEL AND HOOK B
vintage rustic 8 ton snatch block cast iron pulley reel and hook b
$60.00
quality
Antique Vintage Wood Block Double Pulley Split Hook Small only 7 half  Overall
antique vintage wood block double pulley split hook small only 7 half overall
$15.00
quality
Vintage Wood Iron Pulley Block Tackle Primitive Tool Antique Barn Loft VGC
vintage wood iron pulley block tackle primitive tool antique barn loft vgc
$15.99
quality
Vtg BLOCK  TACKLE Barn PULLEY Iron  Wood MYERS OK H 298 Primitive Farm Decor
vtg block tackle barn pulley iron wood myers ok h 298 primitive farm decor
$48.95
quality
Vintage Antique Block  and Tackle Double Pulley with locking device
vintage antique block and tackle double pulley with locking device
$20.00
quality
VINTAGE WOOD  METAL ROPE PULLEY BLOCK  TACKLE METAL ANCHOR EMBLEM
vintage wood metal rope pulley block tackle metal anchor emblem
$14.99
quality
Vintage Wood  Cast Iron Block  Tackle Pulley Excellent Condition
vintage wood cast iron block tackle pulley excellent condition
$9.50
quality
Six Antique Pulleys Metal Hardware Block  Tackle Vintage collectible Pulleys
six antique pulleys metal hardware block tackle vintage collectible pulleys
$59.99
quality
Wood Block Double Pulley Cast Iron Hook Large Heavy Primitive Tool Rusty Dirty
wood block double pulley cast iron hook large heavy primitive tool rusty dirty
$17.88
quality
Vintage Crosby Western Lockport NY Boat PulleY Block  Tackle
vintage crosby western lockport ny boat pulley block tackle
$39.99
quality
antique vintage marine pulley wooden boat blockteardrop
antique vintage marine pulley wooden boat blockteardrop
$24.99
quality
ANTIQUE STAR PULLEY BLOCK AND TACKLE
antique star pulley block and tackle
$9.99
quality
Vintage Block And Tackle With Rope Barn Pulley Fence Stretcher Steampunk
vintage block and tackle with rope barn pulley fence stretcher steampunk
$35.00
quality
ANTIQUE BOSTON  LOCKPORT BLOCK CO DOUBLE WHEEL BLOCK  TACKLE PULLEY
antique boston lockport block co double wheel block tackle pulley
$29.99
quality
UW Antique Wooden 3 Roller Pulley Tackle Block with Metal Hook
uw antique wooden 3 roller pulley tackle block with metal hook
$49.95
quality
Vintage Cast Iron STARHOIST NO 32 VTG BARN BLOCK AND TACKLE PULLEY
vintage cast iron starhoist no 32 vtg barn block and tackle pulley
$24.99
quality
Vintage Green Cast Iron Metal Block  Tackle Wheel Pulley UW4
vintage green cast iron metal block tackle wheel pulley uw4
$18.00
quality
Vintage UW Double Block Pulley Wood Green
vintage uw double block pulley wood green
$20.00
quality
Antique Vintage Farm Tool Hook Pulley Snatch Block Rustic Barn Decor Works
antique vintage farm tool hook pulley snatch block rustic barn decor works
$79.00
quality
Huge Vintage Wood Block  Tackle Metal Pulleys Split Hooks Nautical Lamp
huge vintage wood block tackle metal pulleys split hooks nautical lamp
$89.00
quality
Lot of 2 Vintage Block  Tackle Pulleys
lot of 2 vintage block tackle pulleys
$6.99
quality
Antique wood pulley block and tackle
antique wood pulley block and tackle
$0.99
quality
Old Wooden Pulley Block Rope Antique Dectoration Art WOW
old wooden pulley block rope antique dectoration art wow
$9.99
quality
PRIMITIVE 3 PULLEY WOOD BLOCK AND TACKLE
primitive 3 pulley wood block and tackle
$29.99
quality
Old Wooden Pulley Block Rope Tackle Large Antique Dectoration Art WOW
old wooden pulley block rope tackle large antique dectoration art wow
$9.99
quality
PRIMITIVE WOOD BLOCK AND TACKLE WITH DOUBLE PULLEY AND HOOK
primitive wood block and tackle with double pulley and hook
$29.99
quality
PRIMITIVE WOOD BLOCK AND TACKLE WITH PULLEY AND HOOK
primitive wood block and tackle with pulley and hook
$19.99
quality
VINTAGE GREEN METAL DOUBLE PULLEY 5 BLOCK AND TACKLE
vintage green metal double pulley 5 block and tackle
$19.99
quality
OLD Small Scissor Hooked Single Pulley Wooden Block and Tackle Farm Nautical
old small scissor hooked single pulley wooden block and tackle farm nautical
$39.99
quality
Vintage Snatch block Cast Iron and wood Farm Hay Barn Pulley Rustic Decor
vintage snatch block cast iron and wood farm hay barn pulley rustic decor
$8.00
quality
VINTAGE MKLEIN  SONS BLOCK  TACKLE PULLEY SET TOOLS
vintage mklein sons block tackle pulley set tools
$39.99
quality
VTG McGRAW EDISON BREWER TITCHENER BLOCK TACKLE PULLEY 3001A
vtg mcgraw edison brewer titchener block tackle pulley 3001a
$29.99
quality
Vintage Wood Pulley UW Block  Tackle approx 7 half  BARN RUSTIC DECOR ANTIQUE
vintage wood pulley uw block tackle approx 7 half barn rustic decor antique
$18.90
quality
Atq Vtg Barn Nautical Block Tackle Pulley wHook Cast Iron Metal Triple 12 Tall
atq vtg barn nautical block tackle pulley whook cast iron metal triple 12 tall
$24.95
quality
Vintage Wood Pulley Block  Tackle Blacksmith Anvil BARN RUSTIC DECOR ANTIQUE
vintage wood pulley block tackle blacksmith anvil barn rustic decor antique
$16.51
quality
Vintage Wood Pulley Block  Tackle Star Embossed BARN RUSTIC DECOR ANTIQUE
vintage wood pulley block tackle star embossed barn rustic decor antique
$14.88
quality
Vintage Wood Pulley Block  Tackle BARN RUSTIC DECOR ANTIQUE
vintage wood pulley block tackle barn rustic decor antique
$30.00
quality
Vintage Double Wood and Metal Block  Tackle Pulley ESTATE FIND
vintage double wood and metal block tackle pulley estate find
$24.99
quality
Antique Mississippi River Steam Boat Split Hook Pulley Block and Tackle
antique mississippi river steam boat split hook pulley block and tackle
$89.99
quality
ANTIQUE BLOCK  TACKLE NAUTICAL PULLEY
antique block tackle nautical pulley
$39.25
quality
Antique Primitive Barn Nautical Wooden Pulley w Swivel Ring Block
antique primitive barn nautical wooden pulley w swivel ring block
$23.99
quality
VINTAGE PULLEY WOOD  METAL BLOCK BARN INDUSTRIAL
vintage pulley wood metal block barn industrial
$9.99
quality

Old Wooden Block Tackle Pulley Iron Wheel MARKED
old wooden block tackle pulley iron wheel marked
$99.99
quality
KOLSTRAND SEATTLE BRONZE BRASS TROLLING BLOCK PULLEY FISHING
kolstrand seattle bronze brass trolling block pulley fishing
$50.00
quality
Vintage 5 wood ship pulley block nautical tackle boating hook Barn Farm Pulley
vintage 5 wood ship pulley block nautical tackle boating hook barn farm pulley
$29.99
quality
3 INCH BRASS MARINE PULLEY BLOCK BOAT SHIP TACKLE O D SHANKS HOBBLE VTG INDUSTRY
3 inch brass marine pulley block boat ship tackle o d shanks hobble vtg industry
$50.00
quality
Old Iron Block Tackle Pulley with Wood Wheel Western Nautical decor 1368
old iron block tackle pulley with wood wheel western nautical decor 1368
$84.99
quality
Marine pulley block of ironwood 7x25 inches brass pulleys antique
marine pulley block of ironwood 7x25 inches brass pulleys antique
$150.00
quality
Vintage WOOD Cast Iron Double Block PULLEY TACKLE Barn Ship Boat Large 13 Hook
vintage wood cast iron double block pulley tackle barn ship boat large 13 hook
$29.99
quality
PULLEY WHEEL BLOCK  TACKLE 19th 20th century vintage nautical antique
pulley wheel block tackle 19th 20th century vintage nautical antique
$950.00
quality
VINTAGE MB NAUTICAL DOUBLE WOODEN SHEAVE BLOCK PULLEY GREAT CONDITION WORKS
vintage mb nautical double wooden sheave block pulley great condition works
$59.99
quality
BIG Old Wood Block Tackle Pulley Iron Wheel 1002
big old wood block tackle pulley iron wheel 1002
$139.95
quality
3 SOUTH COAST SNATCH BLOCK
3 south coast snatch block
$69.99
quality
Antique Boston  Lockport Block Co Star Logo Block  Tackle Pulley  Hook
antique boston lockport block co star logo block tackle pulley hook
$28.00
quality
Latching Anvil Pulley Block  Tackle Nautical Farm Barn Wood  Metal 12
latching anvil pulley block tackle nautical farm barn wood metal 12
$29.99
quality
ANTIQUE HUGE INDUSTRIAL PULLEY BLOCK  TACKLE WOOD  METAL 33 LONG HOOK TO RING
antique huge industrial pulley block tackle wood metal 33 long hook to ring
$48.80
quality
old Pulley barn hay loft trolley Hudson 5 wood wheel vintage block
old pulley barn hay loft trolley hudson 5 wood wheel vintage block
$43.80
quality
Vintage GALVANIZED STEEL 5 INCH DOUBLE PULLEY BLOCK AND TACKLE PULLY
vintage galvanized steel 5 inch double pulley block and tackle pully
$29.99
quality
RARE South Coast Vintage block pulley boat rubberized stainless rigging strong
rare south coast vintage block pulley boat rubberized stainless rigging strong
$130.00
quality
Antique Block  Tackle Wood Iron Pulley Nautical
antique block tackle wood iron pulley nautical
$149.99
quality
Antique Block  Tackle Wood Iron Pulley Nautical Triple Pully Barn Square Nut
antique block tackle wood iron pulley nautical triple pully barn square nut
$99.99
quality
Vintage South Coast snatch blockMarine heavy duty sailboat rigging
vintage south coast snatch blockmarine heavy duty sailboat rigging
$49.99
quality
USED SNATCH BLOCK PULLEY TOW TRUCK FACTORY INDUSTRIAL IRON STEEL STEAMPUNK
used snatch block pulley tow truck factory industrial iron steel steampunk
$37.50
quality
Antique Block  Tackle Wood Iron Pulley Nautical Double Pully Hook STAR
antique block tackle wood iron pulley nautical double pully hook star
$28.50
quality
VINTAGE BLOCK  TACKLE DOUBLE PULLEY HAY BARN FENCE STRETCHERS W LOCK  ROPE
vintage block tackle double pulley hay barn fence stretchers w lock rope
$20.00
quality
Old Wooden Block Tackle Pulley with Wood Wheel Western Nautical decor 1432
old wooden block tackle pulley with wood wheel western nautical decor 1432
$88.99
quality

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

Pulley Block

See More About:    Price Guide        Superb Ancient        Diamond Tool        
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