Physics: Principles with Applications
7th Edition
ISBN: 9780321625922
Author: Douglas C. Giancoli
Publisher: Addison-Wesley
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Chapter 4, Problem 32P
Figure 4-53 [shows a block (mass mA) on a smooth horizontal surface, connected by a thin cord that passes over a pulley to a second block (mB), which hangs vertically. (a) Draw a free-body diagram for each block, showing the force of gravity on each, the force (tension) exerted by the cord, and any normal force.(b) Apply Newton's second law to find formulas for the acceleration of the system and for the tension in the cord. Ignore friction and the masses of the pulley and cord.
Figure 4-53
Problems 32 and 33. Mass mArests on a smooth horizontal surface; mBhangs vertically.
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A block of mass m =
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Chapter 4 Solutions
Physics: Principles with Applications
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- (1) The 3-block system shown below is on a surface that is so slippery you may consider it to be frictionless. The 3.0 kg and 1.0 kg masses are connected by a very light rope, and a force F = 84 N force acts directly on the 2.0 kg mass as shown. (a) Calculate: the tension in the rope • the force exerted on the 2.0 kg block by the 3.0 kg block • the force exerted on the 3.0 kg block by the 2.0 kg block. [answer: tension in rope = 14 N; F30n2 = F2on3 = 56 N] (b) Suppose all three blocks had a common speed of 42 m/s to the left at the moment the force F was applied. How long will it take the motion of the blocks to reverse direction after F is applied? [answer: 3.0 s] 1.0 kg F 2.0 kg 3.0 kgarrow_forwardF(N) 100 n Con t(s) An object with a mass of 2 kg moves at a speed of 2 m/s on a smooth horizontal surface and in a straight line, so if a force affects the object in the same direction of motion and changes over time according to the adjacent graph curve and for 4 s, calculate the acceleration of the object in the period (1-3) and the final speed of the object:arrow_forwardIf the normal force exerted by the track on the car when it is at the top of the track (point B) is 6.00 N, what is the normal force on the car when it is at the bottom of the track (point A)?arrow_forward
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