The brakes of a bike (with a person) having a mass of 63 kg, reduces it's velocity from 8.5 m/s to 0 m/s in 3.0 seconds. What is the magnitude of braking force?

Answer 1

V = Vo + a*t

V = 0
Vo = 8.5 m/s
t = 3 s.
Solve for a.(It will be negative)

F = m*a

Answer 2

Cannot understand the answer