Question

Find the initial velocity of
a car that stopped in 10 sec by
applying brakes. The retardation
due to brakes is 2.5 m/s.​

Answer 1

final velocity=0

using first equation ot motion.

v = u + at

put the given value

0 = u. +( -2.5) × 10

0 =. u -25

u = 25 m/s

I hope It will help you.

Answer 2

Answer:

time taken = 10 senconds

final velocity V = zero second

retardation = 2.5m/s

Now, from the first equation of motion we have,

$v = u + at \\ \\ 0 = u - 2.5 \times 10 \\ u = 25m</u></em></strong><strong><em><u>/</u></em></strong><strong><em><u>s</u></em></strong><strong><em><u>$

Hope it helps