Question

A moving trains comes to rest in 10s by applicayion of brakes gind the intial velocity if retardation due to brakes is 3ms swuare also find the disyance travelled

Answer 1

Hii...
Here is your answer..

Solution:-
Time=10seconds
Final velocity=0
Acceleration=3m/s^2
Initial velocity=?

We'll find initial velocity by using equation:-
$= > v = u + at \\ = > 0 = u + ( - 3 \times 10) \\ = > u = 30$
Therefore,
Initial velocity=30m/s

And , Distance travelled=
$= > {v}^{2} = {u}^{2} + 2as \\ = > {(0)}^{2} = {(30)}^{2} + 2 \times ( - 3) \times s$
$= > 6s = 900 \\ = > s = \frac{900}{6} \\ = > s = 150$
Hence,he travelled 150m

Hope it helps uh....✌️✌️✌️