a. Explanation Given data: m = 1500 kg , v = 5.0 m s and μ r = 0.06 Formula used: Write the expression for propulsion force ( f r ) . f r = μ r m g cos θ (1) Here, μ r is the coefficient of rolling friction, m is the mass, g is the acceleration due to gravity, which is known as 9.8 m s 2 , and θ is the angle. Explanation: Since the car is moving at constant speed, consider angle ( θ ) as 0 ° . Substitute 0.06 for μ r , 1500 kg for m , 9 b. To determine To find: The power required for propulsion at 5.0 m s . c. To determine To find: The car’s efficiency.

College Physics: A Strategic Approach (3rd Edition)

3rd Edition

ISBN: 9780321879721

Author: Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field

Publisher: PEARSON

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

Question

Chapter 11, Problem 64GP

To determine

To find: The propulsion force needed to keep the car moving forward at a constant speed.

To determine

To find: The power required for propulsion at 5.0 ms .

To determine

To find: The car’s efficiency.

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Chapter 11, Problem 63GP

Chapter 11, Problem 65GP

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Chapter 11 Solutions

College Physics: A Strategic Approach (3rd Edition)

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The propulsion force needed to keep the car moving forward at a constant speed.

Solution Summary: The author explains that the propulsion force needed to keep the car moving forward at a constant speed is 882 N.

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To find: The propulsion force needed to keep the car moving forward at a constant speed.

To find: The power required for propulsion at 5.0 ms .

To find: The car’s efficiency.

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Chapter 11 Solutions