Question

A body moves in a circular path with constant speed. Its kinetic energy:

• A. Remains constant
• B. Goes on increasing
• C. Goes on decreasing
• D. Becomes zero

Answer 1

The Correct Option is A

Step 1: Understand the concept of kinetic energy: Kinetic energy (KE) of an object is given by the formula KE = 1/2 mv², where m is the mass of the object and v is its speed. Since the body is moving with constant speed, the velocity v does not change, and as a result, the kinetic energy remains constant.
Step 2: Why not the other options? Option (2) "Goes on increasing": The speed of the body remains constant, so the kinetic energy does not increase. Option (3) "Goes on decreasing": The speed remains constant, so the kinetic energy does not decrease. Option (4) "Becomes zero": The kinetic energy is not zero because the body is still in motion, maintaining a constant speed. Hence, the correct answer is that the kinetic energy remains constant.