Changes In Motion
"Newton's laws of motion,Momentum,Weightlessness, action-R
Newton's laws of motion:
1st law: A object at rest tends to stay at rest, and an object in motion will remain in motion until an Unbalanced force acts on it.
examples: A ball on a bus and a roller coaster(shown below)
2nd law: Acceleration depends on the Mass and the net force applied to it.
Examples: Pushing a car and a ball rolling on a long curve
3rd law: Every action has a equal and opposite reaction force.
Examples: Air coming out a balloon and people pushing on each other
The absence of any observable effects of gravitation.
Examples: Sky diving and weighing yourself when falling