1. OTHER LAWS

2. I. NEWTON’S 1 st LAW Also called the law of Inertia. Inertia is not a force It is a property of matter It is the tendency of an object to resist change.

3. B. Actual Law An object at rest will remain at rest or an object in motion will stay in motion until a net force acts on it. Book on table Satellite in space Seatbelts in cars

4. C. Types of Forces F f = force of friction F N = normal force F sp = Spring Force F T = Tension F g = Force of gravity (weight) F c = Centripetal force

5. II. NEWTON’S 3 rd LAW For every action, there is an equal and opposite reaction. We are talking about forces here! Ex. Space Shuttle F gas F Shuttle

6. EXAMPLES Jumping out of a boat Action – you pushing on a boat Reaction boat pushing back on you. 2 different object go in two different directions with the same force.

7. PROBLEM A 50 kg bucket is lifted by a rope. It started from rest and is lifted 3.0 m and is now moving with a velocity of 3.0 m/s. If the rope breaks at 525 N, does it break? F t FgFg F net = F t - F g