A drag racer deploys a parachute and slows down from 130m/s to 45 m/s in 3.0s. What is the acceleration of the racer?

Answer 1

A drag racer deploys a parachute and slows down from 130m/s to 45 m/s in 3.0s. What is the acceleration of the racer?

Answer 2

acceleration = change in velocity / change in time
= ( 45 -130) m/s / 3 s = - 85/3 = -28.3 m/s^2

Answer 3

a = ∆v/∆t = (45-130)/(3-0) = -28.3 m/s^2

not sure why you felt compelled to ask it twice ...

Answer 4

because they can..?