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Name: The pulley system shown in the figure is used to lift a m= 67-kg crate
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Description: The pulley system shown in the figure is used to lift a m= 67-kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulleys, and ropes are ne

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 1CQ: A car is moving forward slowly and is speeding up. A student claims that the car exerts a force on...

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The pulley system shown in the figure is used to lift a m= 67-kg crate. Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume the masses of the chains, pulleys, and ropes are negligible.

Determine the force F required to lift the crate with constant speed.

Determine the tension in the upper chain.

Determine the tension in the lower chain.

Expert Solution

Step 1

Given-

The mass of the object m=67 kg

As shown in figure

(a)

The force F required to lift the crate with constant speed

T+T=mg

2T=mg

$T = \frac{m g}{2} = \frac{67 \times 9.8}{2} = 328.3 N$

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