Question

Problem 10b

Answer 1

Given information

It is given that the height of  hill is  .

A child  of mass  slides starting from rest at the top to the bottom of hill hence initial velocity   .

There is friction and coefficient of friction is given by . 

 

Step-by-step explanation

Step 1.

The free body diagram of child of mass m sliding from the top of the sled is drawn and all the forces acting of the child is marked in the diagram

  represents the angle of hill

Frictional force do work over a distance   (slanting height)