Chapter 2, Problem 1P

To determine

The average velocity of an object over a round trip.

Answer to Problem 1P

The average velocity of the ball will be zero during the round trip.

Explanation of Solution

Formula Used:

Write the expression for the average velocity of the ball during its complete journey.

  $v_{\text{avg}}=\frac{S}{t}$   ..... (1)

Here, $v_{\text{avg}}$ is the average velocity of the ball, $S$ is the total displacement of the ball and $t$ is the time taken by the ball in round trip.

Calculation:

Since the ball moves up and returns back to the final point therefore, the displacement of the ball will be zero.

Substitute $0\text{m}$ for $S$ in equation (1).

  $\begin{array}{c}{v}_{\text{avg}}=\frac{0}{t}\\ =0\text{m}/\text{s}\end{array}$

Conclusion:

Thus, the average velocity of the ball will be zero during the round trip.