Question

a acr is moving with certain velocity comes to halt if the retardation was 5m/s2 find the initial vvelocity of the car

Answer 1

HEY!!

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⏺️Initial velocity, u =?

⏺️Final velocity = 0m/sec

⏺️Acceleration, a = - 5m/s^2

⏺️Time is not given so we will assume t in place of it.

▶️By using the first equation of motion

▶️v = u + at

▶️0 = u + (-5)t

▶️u = 5t

▶️▶️The initial velocity of that can will be 5t m/sec.

Answer 2

$\huge {\orange {\bold {Bonjour!}}}$

According to the question;

Final velocity of car (v) = 0 m/s

Acceleration of car (a) = - 5 m/s²

Initial velocity (u) = ?

Let the time of journey be 't'.

By using first equation of motion we can get initial velocity.

=> v = u + at

=> 0 = u - 5t

=> u = 5t

So, initial velocity of the car is 5t m/s

$\large {\green {\bold {Hope \: it \: helps...:)}}}$