Question

A motorcycle accelerates from 10. m/s to 25 m/s in 5.0 seconds. What is the average acceleration of the bike?

Answer 1

Answer:

Explanation: Option (A) is the correct answer.

The data is given as follows.

Initial velocity $(v_{i})$ = 10 m/s, final velocity $(v_{f})$ = 25 m/s.

Initial time $(t_{i})$ = 0 seconds, final time $(v_{t})$ = 5 seconds.

The formula to calculate average acceleration is as follows.

       Average acceleration = $\frac{v_{f} - v_{i}}{t_{f} - t_{i}}$

                                            = $\frac{(25 - 10)m/s}{(5 - 0)s}$

                                            = $\frac{15}{5}$

                                            = 3 m/s/s

Thus, we can conclude that the average acceleration of the bike is 3 m/s/s.

 

Answer 2

If a motorcycle accelerates from 10 m/s to 15 m/s in 5 seconds, the average acceleration of the bike is 3 m/s/s. This only means that the motorcycle’s velocity will increase 3 m/s every second.  You need to divide 15 m/s which is the difference of 10 and 25 to 5 seconds.