Part (a) To determine The amount of work done against gravity. Explanation Given: Inclination of hill = 7 .50 ° Height of hill = 125 cm Diameter of pedals = 36.0 cm Mass of bicycle and person = 75.0 kg Formula Used: Work done against gravity = Change in Potential energy Δ P E = m g h 2 - m g h 1 Calculation: Initial potential energy = m g h 1 =75 .0 kg×9 .80 m/s 2 ×0 m =0 J Final potential energy = m g h 2 =75 Part (b) To determine Average force that must be exerted on the pedals tangent to their circular path.

7th Edition

ISBN: 9780321733627

Author: Douglas C. Giancoli

Publisher: PEARSON

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Chapter 6, Problem 45P

Part (a)

To determine

The amount of work done against gravity.

Part (b)

To determine

Average force that must be exerted on the pedals tangent to their circular path.

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Chapter 6, Problem 44P

Chapter 6, Problem 46P

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