session.masteringphysics.com Course Home MasteringPhysics: Chapter 4; Assignment

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session.masteringphysics.com Course Home MasteringPhysics: Chapter 4; Assignment 3 Physics question I Chegg.com Chaotar 4 A Problem 4.42 « previous | 2 of 9 next Problem 4.42 Part A A child on a sled reaches the bottom of a hill with a velocity of 12.0 m/s and travels 22.0 m along a horizontal straightaway to a stop. If the child and sled together have a mass of 65.0 kg,what is the magnitude of the average retarding force on the sled on the horizontal straightaway? Submit My Answers Give Up Continue

Explanation / Answer

By Conservation of Energy,

0.5mv^2 = Ff*x

Ff = m*v^2/(2*x)

Ff = 65*(12^2)/(2*22)

Ff = 212.73 N Answer

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