Question

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

A) 2.0 seconds
B) 5.4 seconds
C) 0.18 seconds
D) -1.8 seconds

Answer 1

Here, we know, a = v2 - v1 / t
Here, v2 - v1 = 0 - 6.5 = -6.5
a = -1.2 m/s²

Substitute their valuesm 
-1.2 = -6.5 / t
t = -6.5 / -1.2
t = 5.4 s

In short, Your Answer would be Option B

Hope this helps!