 # Motion and Forces Review

## Presentation on theme: "Motion and Forces Review"— Presentation transcript:

Motion and Forces Review
Unit 5

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

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

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

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

Average Speed S= d/t

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

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

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

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?

Momentum Momentum= mass x velocity p=mv

Effect of forces