A powerful motorcycle can accelerate from rest to 22.2 m/s (80 km/h) in only 3.42 s. What is its average acceleration?

Average acceleration is 6.49 m/s²

Explanation:

We have equation of motion v = u + at

Initial velocity, u = 0 m/s

Final velocity, v = 22.2 m/s

Time, t = 3.42 s

Substituting

v = u + at

22.2 = 0 + a x 3.42

a = 6.49 m/s²

Acceleration is 6.49 m/s²

Average acceleration is 6.49 m/s²