Question

The quantities that could remain constant, if an object's speed is changing, is/are

• A. Displacement
• B. Velocity
• C. Acceleration
• D. Linear momentum
• E. Kinetic energy

Answer 1

Answer: (C)

Acceleration

Displacement, $S=vt$ , when v changing also S will change.

speed and velocity are same in magnitude but speed is scalar and velocity is a vector means velocity is direction-aware.

Acceleration, $a=\frac{dv}{dt}$ So we can say that if speed is changing , the acceleration could remain constant.

Linear momentum $p=mv$ and kinetic energy $=0.5m{v}^2$ so if v changing also p and kinetic energy will change.