Question

83. À bike travels 200 m with constant
acceleration and average velocity of 72
km/h. The final velocity acquired by the bike
is 30 m/s Find
a) acceleration of the bike​

Answer 1

Answer:

Given

displacement (s) =200m

Average velocity = 72 kmph=72 x 5/18=20m/s

Average velocity =s/t

20=200/t => t=10s

final velocity (v) =30m/s

we know that

v=u+at. =>u=v-at. =>u=30-10a

s = ut + 1/2at^2

200 = 300 - 100a + 50a

-100 = -50a

a =2m/s^2