Question

A rollercoaster traveling at a velocity of 30 m/s takes 8 seconds to climb a hill. After 8 seconds, its velocity is 12 m/s. what is its acceleration?

Answer 1

acceleration = ( final velocity- initial velocity ) / time

Initial velocity = 30 m/s

Final velocity = 12 m/s

time = 8 seconds

Replacing:

a = (12 - 30) / 8 = -18/8 = -2.25 m/s2