Question

With an average acceleration of 1.2 m/s^2, how long will it take a cyclist to bring a bicycle with an initial speed of 6.5 m/s to a complete stop

Answer 1

5.4 sec <===== see assumption below

Step-by-step explanation:

If the cyclist is ACCELERATING at 1.2 m/s^2 ....it will not stop.

If the acceleration is - 1.2 m/s^2 , then:

vf = vo + a t

vf = final velocity = 0 vo = original v = 6.5m/s a = - 1.2 m/s^2

0 = 6.5 - 1.2 t then t = 5.42 sec