The initial speed of the body is 36 km / h. With what acceleration did the body move

The initial speed of the body is 36 km / h. With what acceleration did the body move if after 5 seconds its speed became equal to 20 m / s?

Given:

v0 = 36 km / h

v1 = 20 m / s

t = 5s

Find: a =?

Let’s translate 36 km / h into m / s: 36 km / h = 36 * 1000m / 3600s = 10 m / s.

To find the acceleration, we use the formula:

a = (v1 – V0) / t, hence

a = 20 m / s – 10 m / s / 5s = 10 m / s / 5s = 2m / s2

Answer: acceleration 2m / s2