A ball rolling down a hill accelerates uniformly from rest to a velocity of 5 m/s in 10 seconds. What is the acceleration of the ball?

Answer 1

Acceleration is the change in velocity over time, and when acceleration is uniform it can be determined by calculating Δv/Δt.

In this example, Δv = v₂ - v₁ = 5m/s - 0m/s = 5m/s

v₁ is 0 because the ball started "at rest."

And Δt = t₂ - t₁ = 10s - 0s = 10s

So, a = Δv/Δt = (5 m/s) / (10 s) = 0.5 m/s²

Hope this helps.