Question

starting from A stationary position Rahul paddles his bike to attend a velocity of 6 metre per second in 30 second then he applies brakes such that the velocity of bike comes down to 4 metre per second in next 5 second. calculate the acceleration of the bike in both cases??​

Answer 1

Explanation:

case 1

given

Initial velocity u=0m/s

final velocity v=6m/s

time =30sec

find acceraltion

using identity (v=u+at)

v=6

u=0

t=30

6=0+a*30

6/30=a

1/5=a

0.2=a

a=0.2

case 2

Initial velocity u=6m/s

final velocity v=4m/s

time=5sec

using identity (v=u+at)

4=6+a*5

4-6=a*5

-2=a

-2/5=a

a=-0.4m/s

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