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College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs
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The wheels of a midsize car exert a force of 2100 N

Chapter 4, Problem 24

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QUESTION:

Problem 24PE

The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2 , what is the mass of the car plus its occupants? Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton’s laws of motion. For this situation, draw a free-body diagram and write the net force equation.

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QUESTION:

Problem 24PE

The wheels of a midsize car exert a force of 2100 N backward on the road to accelerate the car in the forward direction. If the force of friction including air resistance is 250 N and the acceleration of the car is 1.80 m/s2 , what is the mass of the car plus its occupants? Explicitly show how you follow the steps in the Problem-Solving Strategy for Newton’s laws of motion. For this situation, draw a free-body diagram and write the net force equation.

ANSWER:

Solution

Step 1 of 3

The car is moving forward by exerting a force of  backward on the road through its mid size tyres. The friction force including air resistance is .The acceleration of the car is .We need to find out the mass of the car plus the occupant.

Consider the figure below,

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