Chapter 10, Problem 1STP

To determine

To Choose: The correct option.

Answer to Problem 1STP

Option A

Explanation of Solution

Given:

Weight of ball, $w_B=4\text{N}$

Force exerted by player, $F=5\text{}\text{}\text{N}$ for a distance of $d_1=0.1\text{m}$ .

The ball rolls to a distance of $d=10\text{m}$

Formula Used:

From work-energy principle:

  $\Delta K.E.=W=F\cdot d$

Change in kinetic energy is equal to the work done.

Here, F is the applied force and d is the distance moved.

Calculations:

Kinetic energy obtained by the ball from the player is equal to the work done by the player on the ball.

  $\begin{array}{c}\Delta K.E.=F\cdot d\\ =5\text{N}\cdot 0.1\text{m}\\ \text{=0}\text{.5}\text{J}\end{array}$

Conclusion:

Thus, correct option is A.