A ball rolls down a ramp for 15 seconds. If the initial velocity of the ball was 0.8 m/sec and the final velocity was 7 m/sec, what was the acceleration of the ball ?

Answer 1

If the acceleration is constant. Then, Acceleration = (Velocity2-Velocity1)/(Time2-Time1)

Acceleration = (7-.8)/15 = .413 m/s^2

this is the acceleration of the ball center!