A frightened child is restrained by her mother as the child slides down a frictionless playground slide.
Question:
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?
Step by Step Answer:
a In the workkinetic energy theorem we include both the work due ...View the full answer
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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