Question

I don't know how to begin

A boy is riding a bicycle at a velocity of 5.0 m/s. He applies the brakes and uniformly negatively accelerates to a stop at a rate of 2.5 m/s^2. How long does it take for the bicycle to stop?

Answer 1

I this it's just a simple answer 2.0 s

Answer 2

If you are starting at an initial velocity, and have a uniform acceleration, you can use

Change in velocity = acceleration * time accelerating

Answer 3

\[\large V _{2}-V _{1}=a*t\]

Your final velocity V2, starting at Velocity V1, and constantly accelerating at a, for time t.

\[\large V _{2}=V _{1}+a*t\]

Answer 4

2.5=5*0.5
2.5=2.5

Answer 5

V1 = 5.0 m/s
V2 = 0.0 m/s
a = -2.5 m/s^2

0 = 5.0 + (-2.5)*t

Answer 6

2.5*t = 5.0

t = 2.0 s

Answer 7

thank you