NEET Physics Kinetic Energy MCQ Question
A neutron is slowed from an initial speed of 10^7 m/s to a final speed of 10^3 m/s in an elastic collision. If the mass of the neutron is m, what is the ratio of its initial kinetic energy to its final kinetic energy?
10^8
10^4
10^6
10^2
Correct Answer
Detailed Explanation
The kinetic energy of an object is proportional to the square of its velocity. Therefore, the ratio of initial to final kinetic energy is (10^7 / 10^3)^2 = 10^6.
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