A sports car accelerates from rest to 86km/h\, km/h in 5.2s\, s . What is its average acceleration in m/s2{\rm{m/s}}^2.

Answer 1

V = 86km/h = 86000m/3600s = 23.89 m/s.

a=(V-Vo)/t = (23.89-0)/5.2 = 4.59 m/s^2