The train, 20 seconds after the start of movement, acquires a speed of 90 meters per second.

The train, 20 seconds after the start of movement, acquires a speed of 90 meters per second. What is the acceleration of a train?

Given:

t = 20 s

v = 90 m / s

Find: Acceleration a.

Acceleration is a physical quantity that determines the rate of change in the speed of a body.

Let’s write down the acceleration formula.

a = v / t

Let’s substitute our data into the formula.

a = 90/20 = 4.5 m / s ^ 2.

Answer: The acceleration of the train is 4.5 m / s ^ 2