An object at rest starts acceleraing. if it travels 40 meters to the end up going 20 m/s. what was its acceleration?

Answer: The car's acceleration is 5m/s^2

Explanation: The acceleration is the change in velocity per unit time.

Here the initial velocity is 0 the final velocity is 20.

So this formula is applicable.

V^2 = u^2 + 2as

20^2 = 0^2 + 2a (s)