Question

Find the initial velocity of a car which is stopped in 10
seconds by applying brakes. The retardation due to brakes
is 2.5 m/s2
​

Answer 1

Answer:V(final velocity)=0

a=2.5m/s²

t=10 sec

V=U+at

0=U+2.5×10

Explanation:

Answer 2

Answer:

Initial velocity = 25 m/s

Explanation:

Time = 10 sec, Retardation = -2.5 m/s^2 and Final velocity = 0 m/s

v = u + at (First Equation Of Motion)

0 = u + (-2.5)(10)

0 = u - 25.0

-u = -25.0

u = 25 m/s