Chapter 3, Problem 2STP

To determine

To Choose: The correct option.

Answer to Problem 2STP

Option B: $8.0\text{m/s}$

Explanation of Solution

Given:

Acceleration of ball, $a=2.0{\text{m/s}}^{\text{2}}$

Initial velocity of the ball, $u=0$

Time elapsed, $t=4.0\text{s}$

Formula Used:

First equation of motion:

  $v=u+at$

Where, v is the final velocity, u is the initial velocity, t is the time and a is the acceleration.

Calculations:

Substitute the values and solve:

  $\begin{array}{l}v=u+at\\ v=0+\left(2.0\right)\left(4\right)\\ v=8.0\text{m/s}\end{array}$

Conclusion:

Thus, correct option is B.