1. Force and Motion
Review

2. Sir Isaac Newton
1642 – 1727
Laws of Motion

3. Potential Energy Kinetic Energy stored energy Energy in motion
You have potential energy- in your group come up with other examples- hands together / hands out
Kinetic Energy
Energy in motion

4. Forces cause objects to
A push or pull
Forces cause objects to
Speed up
Slow down
Change direction
Stay on the ground
Ball- push out

5. Balanced Forces
no movement
Unbalanced Forces
movement
Rope link

6. Inertia keep on doing what it’s doing At rest- stay at rest
In motion – stay in motion
… until another force acts on it!
cup

7. Momentum
The amount of mass and the speed at which that mass is moving.
More mass + more speed =
more momentum
More momentum = difficult to stop
Race zoom hands

8. Gravity Gravity is a force that attracts objects together.
The larger an object’s mass, the greater the gravitational force
The greater the distance between two objects, the smaller the gravitational force
On earth, this force attracts everything to Earth
People link pull down throw a ball

9. Friction Friction is a Force
The force between two objects in contact with each other.
Friction is a Force
Resistive force
The force of friction works in the opposite direction of the force of motion
Causes objects to slow down and/or stop
Useful and wasteful friction
Air Resistance- a larger surface area usually results in greater air resistance
From Glencoe Physical Science
Hands

10. Mass The greater the mass… The amount of matter
The more gravity pulls on it
The greater the friction
The greater the force required to move it
The greater the inertia
The more the momentum
Rolling chair

11. Simple Machines Help increase your force to make work easier.
Help you move mass- env ex
Force and Motion Jeopardy

12. Help you move mass- env ex

13. Help you move mass- env ex

14. Help you move mass- env ex

15. Help you move mass- env ex

16. Help you move mass- env ex