Question

For an object under uniform circular motion, which of the following remains constant

• A. Kinetic energy
• B. speed
• C. all of these
• D. magnitude of acceleration

Answer 1

Answer: (C)

all of these

Answer 2

In uniform circular motion, the object's speed is constant by definition. Consequently, its kinetic energy ($KE = \frac{1}{2}mv^2$) also remains constant because both mass and speed are constant. The magnitude of centripetal acceleration ($a_c = \frac{v^2}{r}$) is also constant as both speed and radius are constant. Therefore, all three listed quantities (kinetic energy, speed, and magnitude of acceleration) remain constant.