Pulley Set
Saturday, May 28th, 2011Pulley Set
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 New Sram XX 10 Speed Rear Derailleur Mid Cage Carbon Mountain Bike off road  US $219.00
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 SRAM XX Mountain Bike Derailleur Set Front and Rear US $51.00
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 SRAM X9 9 sp Rear MEDIUM cage Derailleur carbon X US $111.00
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 Campagnolo Record Pulley Bolt Set Fits 2006 2008 US $27.27
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 Shimano Rear Derailleur Pulley Set 10sp 105 RD 5700 SS GS 105 5700 10 speed US $14.99
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 NEW SRAM DERAILLEUR PULLEY SET FOR 2010 SRAM X7 X9 REAR DERAILLEUR US $4.99
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 Sram X9 Shifter and Derailleur 9 speed Used US $4.00
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 NEW SRAM X7 9S SHORT CAGE REAR DERAILLEUR 7 8 9 SPEED X7 9SPD 8SPD X9 SLX 7SPD US $61.03
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 MOWA Jocky Wheels Pulleys 2Pcs 11T Blue US $19.98
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 NEW SRAM X7 SHORT CAGE REAR DERAILLEUR SHIFTER COMBO 9 SPEED 9S 9SPD X7 SLX US $98.83
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Acceleration of two blocks on a pulley system?
two blocks are connected by a rope that passes over a set of pulleys. One block has a weight of 412N the other has a weight of 908N. The rope and the pulley's are massless and there is no friction.
A. what is the acceleration of the lighter block?
B. Suppose that the heavier block is removed, and a downward force of 908N is provided by someone pulling on the rope. Find acceleration of the remaining block.
C. Explain why the answers in A and B are different
This problem is based upon what is called an Atwood machine.
The basic equation to find acceleration for (A) is:
a = g(m2 - m1)/(m1 + m2)
m1 = 908/g
m2 = 412/g
a = g(m2/g - m1/g)/(m1/g + m2/g)
so,
a = (908 - 412)/(412 + 908) = 3.68 m/s^2
For (B), this boils down to a F=ma problem. Draw a free body diagram.
m2 = 412/g = 42.0 kg
Force up = 908N
Force down = m(g+a) = (42)(9.8 + a) = 412 + 42a
The two forces balance:
908 = 412 + 42a
a = 11.8 m/s^2
(C) The two are different because in (B) there is only one mass to accelerate.
See link below for further info.
Hope this helps.
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New Sram XX 10 Speed Rear Derailleur Mid Cage Carbon Mountain Bike off road US $219.00
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SRAM XX Mountain Bike Derailleur Set Front and Rear US $51.00
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SRAM X9 9 sp Rear MEDIUM cage Derailleur carbon X US $111.00
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Campagnolo Record Pulley Bolt Set Fits 2006 2008 US $27.27
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Shimano Rear Derailleur Pulley Set 10sp 105 RD 5700 SS GS 105 5700 10 speed US $14.99
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NEW SRAM DERAILLEUR PULLEY SET FOR 2010 SRAM X7 X9 REAR DERAILLEUR US $4.99
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Sram X9 Shifter and Derailleur 9 speed Used US $4.00
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NEW SRAM X7 9S SHORT CAGE REAR DERAILLEUR 7 8 9 SPEED X7 9SPD 8SPD X9 SLX 7SPD US $61.03
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MOWA Jocky Wheels Pulleys 2Pcs 11T Blue US $19.98
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NEW SRAM X7 SHORT CAGE REAR DERAILLEUR SHIFTER COMBO 9 SPEED 9S 9SPD X7 SLX US $98.83
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 Tacx Ball Bearing Shimano 9 10 Derailleur Pulley Set Shim9 10 US $14.77
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 SRAM Force Rival Apex Rear Derailleur Pulley Set US $17.69
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 Shimano Ultegra 6700 Upper Lower 10 Speed 11 Teeth Pulley Set Ultegra 6700 US $18.99
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 NEW SRAM X7 9S LONG CAGE REAR DERAILLEUR 7 8 9 SPEED X7 9SPD 8SPD X9 SLX 7SPD US $61.03
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 Tacx Ball Bearing SRAM Derailleur Pulley Set US $15.00
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 2 pcs Bike Bicycle Alloy Rear Derailleur Pulley 11T Red US $22.49
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 Bike Bicycle Alloy Rear Derailleur Pulley 11T Red 1 SET US $22.49
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 Shimano Deore XT Rear Derailleur 8 Speed Long Cage RD M737 US $39.20
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 Shimano Deore Shadow Rear Derailleur 9 Speed RD M592 US $29.00
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 Shimano Deore LX Rear Derailleur Long Cage 9 Speed RD M571 US $27.25
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 Shimano Deore LX Rear Derailleur Rapid Rise RD M580 US $27.20
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 SRAM X9 9 sp Rear long cage Derailleur carbon silver X US $111.00
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 SRAM X9 MTB REAR DERAILLEUR 9 SPEED MOUNTAIN BIKE 29ER HYBRID X9 LONG CAGE NIB US $71.50
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 SRAM X0 10sp Rear MTB Bicycle Long Derailleur Gold US $139.99
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 2011 Sram X9 10 Speed Rear Derailleur Short or Medium Cage US $89.95
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 KCNC 11t Derailleur Jockey Wheel Pulley Pair Blue US $30.14
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 KCNC REAR DERAILLEUR PULLEY JOCKEY WHEEL 1PCS 10T RED US $17.99
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 Campagnolo 9 Speed Pulley Set 2 Blister Pack US $28.79
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 KCNC REAR DERAILLEUR PULLEY JOCKEY WHEEL 1PCS 11T RED US $17.99
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 SRAM Derailleur pulleys 03 07 X0 short cage X9 X7 US $33.43
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 Bike Bicycle Rear Derailleur Pulley 1Set 11T Red TAIWAN US $26.67
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 NEW KCNC ALLOY JOCKEY WHEEL REAR DERAILLEUR PULLEY 11T BOLTS SILVER US $38.60
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 NEW KCNC ALLOY JOCKEY WHEEL REAR DERAILLEUR PULLEY 11T BOLTS RED US $38.60
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 NEW KCNC ALLOY JOCKEY WHEEL REAR DERAILLEUR PULLEY 11T BOLTS GOLD US $38.60
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 NEW KCNC ALLOY JOCKEY WHEEL REAR DERAILLEUR PULLEY 11T BOLTS BLUE US $38.60
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 NEW KCNC ALLOY JOCKEY WHEEL REAR DERAILLEUR PULLEY 11T BOLTS BLACK US $38.60
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 SRAM BlackBox and XX Ceramic Bearing 10 Speed Pulley Set US $116.67
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 Campagnolo 10 Speed Pulley Set 2 Blister Pack US $31.06
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 XTR M980 10 speed Rear Derailleur Pulley Set US $43.94
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 Shimano 9 Speed XTR M970 series Pulley Set US $43.92
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 Tacx SRAM Ceramic Derailleur Pulleys Set US $60.61
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 KCNC REAR DERAILLEUR PULLEY JOCKEY WHEEL 1PCS 11T GOLD US $17.99
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 NEW SRAM X7 MID CAGE REAR DERAILLEUR 7 8 9 SPEED MEDIUM X7 9S 9SPD 8SPD X9 SLX US $61.03
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 NEW SRAM X7 LONG CAGE REAR DERAILLEUR SHIFTER COMBO 9 SPEED 9S 9SPD X9 SLX X9 US $98.83
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 NEW SRAM X7 MID CAGE REAR DERAILLEUR SHIFTER COMBO 9 SPEED 9S 9SPD X7 MEDIUM US $98.83
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 KCNC 11t Derailleur Jockey Wheel Pulley Pair Silver US $30.14
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 KCNC 11t Derailleur Jockey Wheel Pulley Pair Gold US $30.14
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 KCNC REAR DERAILLEUR PULLEY JOCKEY WHEEL 1PCS 11T GREEN US $17.99
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 SRAM X0 9 Speed Medium Cage Rear Derailleur NEW US $167.95
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 NEW 1 Pair Bike Bicycle AL 7075 T6 Rear Derailleur Pulley 11T Gold for Shimano US $23.35
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