Question

A body at rest or moving with a uniform velocity will have acceleration equal to

• A. 1 m/s²
• B. 0 m/s²
• C. Infinite
• D. none

Answer 1

The correct option is B

0 m/s²

1. Acceleration is defined as the rate of change of velocity with respect to time.
2. The 1st law of motion states that if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
3. Since the body is at rest or moving with constant velocity. Therefore force $\left(F\right)$ acting on the body will be zero.
4. From the 2nd law of motion $F=ma[whereFisforce,aisaccelerationandmismass]$.
5. Since the force applied is zero $(F=0)$, it means acceleration $\left(a\right)$ is zero.

Hence, option B is correct.