Chapter 3.1, Problem 5PP

To determine

Average acceleration of the car.

Answer to Problem 5PP

  $8{\text{ m/s}}^2$

Explanation of Solution

Given:

Velocity of car is increases from 4 m/s to 36 m/s in 4 s.

Formula used:

Acceleration is defined as the change in velocity with respect to time.

  $a=\frac{v-u}{t}$

Here, v is final velocity, u is initial velocity and t is time.

Calculation:

Now, putting the value of u, v and t.

  $\begin{array}{l}a=\frac{v-u}{t}\\ =\frac{36-4}{4}\\ =\frac{32}{4}\\ =8{\text{ m/s}}^2\end{array}$

Conclusion:

Therefore, average acceleration of car is $8{\text{ m/s}}^2$ .