Question

A sports car accelerates at a constant rate from rest to a speed of 90 km/hr in 8 s. What is its acceleration?.

Answer 1

Step-by-step explanation:

u=0

s=90km/h

t=8s

a=?

But we need to convert 90km/h to m/s

36km/h=10m/s

=36/90=10/x

36x=900

x=900/36

x=25m/s

Formula.... S=ut+1/2at×t

25=0×8+1/2×a×8×8

25=a/2×64

25=64a/2

50=64a

a=50/64

a=0.78125m/s