17. A child (mc=26.1 kg) on a bicycle (mb=11.2 kg) goes down a hill as shown. 7.6 m 5.6 m He starts at Point A, from rest; he then goes to the lowest point, Point B, before coming back up to Point C on another hill. Assume no energy is lost to friction or air resistance a. What is his speed at B? b. What is his speed at C? c. If 40% of the total energy of the system is lost due to friction, can the child make it to the top of the second hill?

17. A child (mc=26.1 kg) on a bicycle (mb=11.2 kg) goes down a hill as shown. 7.6 m 5.6 m He starts at Point A, from rest; he then goes to the lowest point, Point B, before coming back up to Point C on another hill. Assume no energy is lost to friction or air resistance a. What is his speed at B? b. What is his speed at C? c. If 40% of the total energy of the system is lost due to friction, can the child make it to the top of the second hill?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Instantaneous Power

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Question

17. A child (mc=26.1 kg) on a bicycle (mb=11.2 kg) goes down a hill as shown.
7.6 m
5.6 m
He starts at Point A, from rest; he then goes to the lowest point, Point B, before
coming back up to Point C on another hill. Assume no energy is lost to friction or air
resistance
a. What is his speed at B?
b. What is his speed at C?
c. If 40% of the total energy of the system is lost due to friction, can the child make it
to the top of the second hill?

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