Newton's Laws

Newton's Laws:

1. an object with no net force acting on it remains at rest or moves with constant velocity in a straight line.
2. the acceleration of a body is directly proportional to it's mass (F=ma).
3. when one object exerts a force on a second object, the second exerts a force on the first that is equal in magnitude but opposite in direction.
   

LESSONS
Trolley experiments (as on P136)
Change in readings on scales in a lift
The water rocket
Ping-pong ball and marble