Question

2. A motorcycle is being driven at a speed of 20m/s when brakes are applied to bring it to rest in five seconds. The retardation will be * 1 point a) +4m/s^2 b) -4m/s^2 c) +0.25m/s^2 d) -0.25m/s^2

Answer 1

Answer:

a  = Δv/t

a = 0-20/5

a = 4 m/s/s

the value will be positive since we are asked about the retardation