Asked by roli

A man moves on his bike with 54km/h and takes u- tune (180 degree)and continues it speed to move with same speed .the time of u-tune is 10sec.find its average accleration
Answered by Henry
r = 54km/h = 54000m/3600s = 15m/s.

a = (V-Vo)/t = (-15-15)/10 = -30/10=-3.0
m/s^2.