An object moving with constant acceleration changes its speed from 20 m/s to 60 m/s in 2.0 s. what is the acceleration? (b) how far did it move in this time?

a)

b) 80 m

Explanation:

Given:

Initial velocity of the object, u=20 m/sFinal velocity of the object, v=60 m/sTime taken, t=2 s

Using Equation of motion we have

a)Let a be the acceleration of the object

b) Let d be the distance covered by the object given by

Using equation of motion we have

The answer is going to be c

The objects do not reach terminal velocity         there is not enough time from the time the object falls from when it hits the ground to achieve terminal velocity. an object must be placed higher to achieve terminal velocity in order to be in free fall.