Question

a car acquires a velocity of 72km/h in 20 sec starting from rest. find the acceleration

Answer 1

U=0
t=20sec
V= 72 km/hr = 72 X 5/18 m/sec
=20 m/sec
a = v - u/t
= 20 - 0 / 20
= 1 m/sec ^2
Thus the acceleration is 1m/sec^2.

Answer 2

Answer:

U = 0 km/hr

V = 72 km/hr ×5/18 = 20 m/s

t = 20 s

Acceleration = V - U/ t

= 20 - 0/20

= 1 m/s²