Question

 A car starts from rest, accelerates uniformly and attains a velocity of 20 m/s with in 50 metres. Find acceleration.​

Answer 1

Answer:

Hello !

$v^{2} -u^{2} =2as$

Given ;-

$s = 50 m$,

$initial velocity (u) = 0m/s (rest)$,

$final velocity (v) = 20m/s,$

so,

$20^{2} -0^{2} = 2a(50)$

$400-0= 100a$

$400= 100a$

$a= 400$ ÷ $100$

$a = 4m/s^{2}$.

Hence, acceleration of the car = $4m/s^{2}$.