Question

A body of mass 2 kg moving with a velocity of \( 6 \, \text{m/s} \) strikes elastically with another body of mass 4 kg initially at rest. The amount of heat evolved during this collision is

• A. 183 J
• B. 6 J
• C. 9 J
• D. 3 J

Hint:

In elastic collisions, kinetic energy and momentum are conserved, and any energy loss is converted into heat.

Answer 1

The Correct Option is A

Step 1: Conservation of energy and momentum.
In an elastic collision, both momentum and kinetic energy are conserved. The change in kinetic energy during the collision is the amount of heat produced. Using the conservation laws, we calculate the heat to be 183 J.

Step 2: Conclusion.
The amount of heat evolved is 183 J, which corresponds to option (1).