1. A race car accelerates at a rate of 15.6 m/s. If it starts from rest, how much time till it

is traveling at 325 km/h?

Answer: 5.79 s

Explanation:

Vs=0 m/s starting speed (from rest)

Vf=325 km/h = 325*1000/3600 = 90.28 m/s

a=15.6m/s²

Using equation for acceleration we can find out time:

a = (Vf-Vs) / t

t = (Vf-Vs) / a

t = (90.28 m/s-0m/s) / 15.6 m/s²

t=5.79 s