Question

A particle is moving in a horizontal circle with constant speed. It has constant.

• A. Velocity
• B. Acceleration
• C. Kinetic energy
• D. Displacement

Answer 1

The correct option is C

Kinetic energy

Step 1: Draw the required diagram

The force is constant and acts at right angles to the particle's motion.

Force provides the centripetal acceleration in a uniform circular motion.

$\Rightarrow a_c=\frac{v^2}{r}$

Where, $a_c=$radial acceleration, $v=$linear speed, and $r=$radius of the circle.

The speed and kinetic energy of the particle remains constant.

Step 2:

Since the particle's speed is constant, its kinetic energy is also constant, as seen above.

Therefore, because the particle's starting and end velocity are the same, the change in kinetic energy will be zero.

Final answer:

Hence, the correct answer is option C. i.e., Kinetic energy.