Answered: Cara is skiing down a hill. Her total…

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter5: Displacement And Force In Two Dimensions

Section: Chapter Questions

Problem 8STP

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Cara is skiing down a hill. Her total mass (including the skis) is 70.4 kg. When she reaches the bottom of the ski slope, and the ground becomes level, she is moving at 6.22 m/s. The coefficient of friction between her skis and the snow is 0.114. How fast will Cara be moving 2.95 seconds after reaching the bottom of the slope?

	1.12 m/s
	3.30 m/s
	2.92 m/s
	2.16 m/s

Expert Solution

Step 1

Given data-

Mass of Cara is $(M) = 70.4 k g$

Initial velocity of Cara is $(v_{0}) = 6.22 m / s$

Coefficient of friction is given by $(μ_{k}) = 0.114$

Time interval after which the velocity is required to be calculated is $(t) = 2.95 s$

In this case when Cara reaches the ground level the only force acting on her is frictional force.

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