Q. 32

Expert-verified
Found in: Page 229

### Physics for Scientists and Engineers: A Strategic Approach with Modern Physics

Book edition 4th
Author(s) Randall D. Knight
Pages 1240 pages
ISBN 9780133942651

# A kg softball player slides into second base, generating J of thermal energy in her legs and the ground. How fast was she running?

Speed of the player is m/s

See the step by step solution

## Step 1. Kinetic to Thermal energy

The frictional force is generated because of sliding; it's a dissipative force that converts the mechanical energy to thermal energy.Here is that the thermal energy generated and is change in mechanical energy.

## Step 2. Find the velocity

Consider the above formula,

Here is that the initial speed, is that the final speed and is that the mass of player.Substitute for forand for

Therefore, the initial speed of the player was .