Choose the correct statement:

Options

A. The magnitudes of sped and velocity are the same when a body travels in a straight line path.
B. The average speed of a moving body can be equal to zero, but its average velocity cannot be equal to zero .
C. To describe the velocity , direction is necessary.
D. Both (a) and ( c)

Answer

D

Explanation

(1) When a body travels in a strianght line path, its distance and displacment are equal , and hence, in a given time , its velocity is equal to its speed.
(2) . The average velocity of a body may be equal to zerom but the average speed will not be equal to zero uncles and unit the distance covered is zero (i.e the body is at rest
(3) . To describe velocity, direaction is necessary as velocity is speed in a specific direaction.