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Q. 32

Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
Found in: Page 229

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Short Answer

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 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 .

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