Question

Starting from a stationary position,Rehan paddles his bicycle to attain a velocity of 6m/s in 30s. There he applies brakes such that the velocity of the bicycle comes down to 4m/s in the next 5s . Calculate the acceleration of the bicycle in both the cases.

Answer 1

Hello,

Starting from a stationary position, Rahul paddles his bicycle to attain a velocity of 6 m s–1 in 30 s. Then he applies brakes such that the velocity of the bicycle comes down to 4 m s-1 in the next 5 s. Calculate the acceleration of the bicycle in both the cases.

CASE I

Given,

Initial Velocity(u)=0m/s

Final Velocity(v)=6m/s

time(t)=30 secs

Acceleration=?

v=u +at

v=0+a(30)

6=0+a(30)

6-0=a(30)

6/30=a

a=1/5 m/s-2

a=0.2m/s-2

CASE II

Given,

Initial Velocity(u)=6m/s

Final Velocity(v)=4m/s

time(t)=5 secs

acceleration=?

v=u+at

4=6+a(5)

4-6=a(5)

-2/5=a

a=-0.4m/s-2

Pls mark me

Answer 2

Answer:

hence here is your answer dear