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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs
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Integrated Concepts(a) What force must be supplied by an

Chapter 7, Problem 64

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QUESTION:

Problem 64PE

Integrated Concepts

(a) What force must be supplied by an elevator cable to produce an acceleration of 0.800 m/s2 against a 200-N frictional force, if the mass of the loaded elevator is 1500 kg? (b) How much work is done by the cable in lifting the elevator 20.0 m? (c) What is the final speed of the elevator if it starts from rest? (d) How much work went into thermal energy?

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QUESTION:

Problem 64PE

Integrated Concepts

(a) What force must be supplied by an elevator cable to produce an acceleration of 0.800 m/s2 against a 200-N frictional force, if the mass of the loaded elevator is 1500 kg? (b) How much work is done by the cable in lifting the elevator 20.0 m? (c) What is the final speed of the elevator if it starts from rest? (d) How much work went into thermal energy?

ANSWER:

Part (a)

Step 1 of 7:

Consider an elevator cable is accelerating at a particular rate. The motion is affected by a frictional force. The mass of the elevator is given. We need to find the force supplied by the elevator cable to produce that acceleration.

The acceleration produced

The mass of the elevator

The frictional force acting

The acceleration due to gravity

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