Asked Oct 11, 2019

A 21-kg child starts from rest and slides down a slide that is 3.9 m high. At the bottom of the slide, the child is moving 1.28 m/s.

m = 21 kg
h = 3.9 m
v = 1.28 m/s


How much work was done by the nonconservitive force of friction on the child?



Expert Answer

Step 1

From the theorem of work-kinetic energy, we have the net work done equa...


Image Transcriptionclose

W AK net - 1 1 ту! 2 W gravity W ту friction 2 1 1 mv7 -mv-mgh W friction _ 2 2


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