Question

A car acquires a velocity of 72 km per hour in 10 seconds starting from rest . Find the acceleration

Answer 1

First convert Km/h in m/s:

72000m/3600s = 20m/s

From v=at we get a=v/t = 20m/s/10s = 2m/(s*s)

Teh average velocity is 10m/s or 36Km/h

Answer 2

answer is acceleration is 2 m/s²