Question

A particle is constrained to move on a straight line path. It returns to the starting point after $10sec$. The total distance covered by the particle during this time is $30m$. Which of the following statements about the motion of the particle is true?

• A. Displacement of the particle is zero
• B. Average speed of the particle is $3m/s$
• C. Displacement of the particle is $30m$
• D. both (a) and (b)

Answer 1

The correct option is D both (a) and (b)

Since the particle comes to its initial position,its displacement is zero.

Average speed of the particle:

$V_{avg}=\frac{totaldistance}{totaltime}$

$=\frac{30}{10}=3m/s$