(a) Explanation The car moves with an acceleration under the action of a force. This motion of the car is related by the newton’s second law of motion. Write the expression for the static equilibrium of the car for initial case as. F = m a Rearrange the above equation for a . a = F m (I) Here, F is the net force acting on the car, m is the mass of the car and a is the acceleration of the car. Case 1: Since, the net horizontal force acting on the car is increased by making the changes in the engine; there will be a change in the acceleration of the car. Write the expression for the new horizontal force acting on the car as. F 1 = F + ( 24 % of F ) = F + ( 24 100 F ) Simplify the above equation. F 1 = 1.24 F (II) Here, F 1 is the new horizontal force on the car. Write the expression for the new acceleration of the car under the action of force. a 1 = F 1 m (III) Here, a 1 is the new acceleration of the car (b) To determine The acceleration after changing the mass as well as the force.

Physics for Scientists and Engineers with Modern Physics, Technology Update

9th Edition

ISBN: 9781305401969

Author: SERWAY, Raymond A.; Jewett, John W.

Publisher: Cengage Learning

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Chapter 5, Problem 73AP

(a)

To determine

The change which results in greater increase in the acceleration.

(b)

To determine

The acceleration after changing the mass as well as the force.

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Chapter 5, Problem 72AP

Chapter 5, Problem 74AP

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Physics for Scientists and Engineers with Modern Physics, Technology Update

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The change which results in greater increase in the acceleration.

Solution Summary: The author explains that the increase in acceleration is due to removing of the mass, which is related by the newton’s second law of motion.

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The change which results in greater increase in the acceleration.

The acceleration after changing the mass as well as the force.

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Chapter 5 Solutions