A frightened child is restrained by her mother as the child slides down a frictionless playground slide. If the force on the child from the mother is 100 N up the slide, the child’s kinetic energy increases by 30 J as she moves down the slide a distance of 1.8 m. (a) How much work is done on the child by the gravitational force during the 1.8 m descent? (b) If the child is not restrained by her mother, how much will the child’s kinetic energy increase as she comes down the slide that same distance of 1.8 m?

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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A frightened child is restrained by her mother as the child slides
down a frictionless playground slide. If the force on the child from the
mother is 100 N up the slide, the child’s kinetic energy increases by 30 J
as she moves down the slide a distance of 1.8 m. (a) How much work is
done on the child by the gravitational force during the 1.8 m descent?
(b) If the child is not restrained by her mother, how much will the
child’s kinetic energy increase as she comes down the slide that same
distance of 1.8 m?

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