• Sir Isaac Newton• 1642 – 1727• Laws of Motion

PotentialEnergy

stored energy

Kinetic Energy

Energy in motion

Force A push or pull

Forces cause objects to

Speed upSlow down

Change directionStay on the ground

Balanced Forces

no movement

Unbalanced Forcesmovement

Inertia keep on doing what it’s

doing

At rest- stay at restIn motion – stay in motion

… until another force acts on it!

MomentumThe amount of mass

and the speed at which that mass is

moving.

More mass + more speed =

more momentum

More momentum = difficult to stop

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

Friction 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

Mass The amount of matter

The greater the mass…

- 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

Simple Machines

Help increase your force to make work easier.

Force and Motion Jeopardy