Question

Amit wants to fire a bullet from a motorcycle. if the speed of motorcycle is 20 m/s find the initial velocity of bullet if it takes 20 sec to stop at a retardation of 2 m/s​

Answer 1

u=?

v=0

t=20s

a= -2m/s²

v=u+at

=>0=u+(-2)(20)

=>-u=-2*20

=>-u=-40

=>u=40 m/s

Therefore, initial velocity of the bullet is 40m/s.

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