1. Motion and Forces Review
Unit 5

2. Velocity Speed Velocity 50 Miles per hour 25 m/s 50 mph
10 meters per second
50 miles per hour east
25 m/s towards home
50 mph left
10 meters per second up

3. Friction Occurs between all things in motion and contact
Always opposes motion
Static > Kinetic
Rolling < Sliding
Slows things down.

4. Unbalanced Forces
What would the result of forces on the box below be?

5. Newton’s 1st Law The law of inertia
No change in motion will occur without an unbalanced force.

6. Average Speed
S= d/t

7. Inertia The tendency of an object to remain at rest or in motion
Newton’s 1st Law
Depends on an objects mass but not velocity
More massive objects have more inertia

8. Gravity Fundamental force of nature
Depends on mass of objects and distance between them.
If Gravity decreases, weight decreases
If Gravity decreases, mass remains the same

9. Newton’s 3rd Law Law of Action-Reaction Action Force = Reaction Force
For every action there is an opposite and equal reaction.

10. Newton’s 2nd Law Force = mass x acceleration F=ma
If a toy car is pushed with a 5 N force and has a mass of 10 kg what will it’s acceleration be?

11. Momentum
Momentum= mass x velocity
p=mv

12. Effect of forces