Vertical projectile motion

Question 1

Define free fall:

Answer 1

An object is in free fall if the only force acting on it is gravitational force.

Question 2

Define gravitational acceleration:

Answer 2

Gravitational acceleration is the acceleration an object will experience due to gravity. On Earth it has
a constant value of 9,8 m.s-2 downwards.

Question 3

Define terminal velocity:

Answer 3

Terminal velocity is the maximum velocity a falling body reaches when air resistance prevents it
from accelerating further.