Select the correct statement. For a particle moving on a straight line

Options

A. magnitude of velocity is equal to the speed of the particle
B. if position and velocity have same sign then particle is moving away from the origin.
C. magnitude of average velocity is equal to the average speed for a given interval.
D. If speed of the particle femains zero in a time interval then acceleration is equal to zero at any instant of the time during that interval

Answer

a,b,d

Explanation

Option (a) and (b) can be understood. When speed of the particle remains zero then it means paritcle is at rest in a time interval, hence velocity also remains zero and hence acceleration reamins zero during that interval of time.