The car moving away from a place within 5 seconds can increase the speed up to 72 km / h.

The car moving away from a place within 5 seconds can increase the speed up to 72 km / h. Determine the acceleration of the vehicle.

By definition, the acceleration at uniformly accelerated motion is determined by the formula:

a = (v – v0) / t, where v and v0 are final and initial velocities, t is time.

In this case, v0 = 0, then we get:

a = v / t.

Let us express the speed in m / s:

72 km / h = 72000/3600 m / s = 20 m / s.

Then:

a = 20/5 = 4 m / s ^ 2.

Answer: the required acceleration is 4 m / s ^ 2.