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Friction

100

• is a force that slows or stops motion between surfaces

Friction

200

• friction keeps objects from starting to move

Static friction

300

• Happens when one object slides across another

Sliding friction

400

• Occurs when something rolls along a surface

Rolling friction

500

Occurs when something moves through water or air

Fluid friction

Force

100

is a push or pull motion

Force

200

• is a force that pulls objects toward each other

Gravity

300

• can attract (pull) or repel (push) objects

Magnetic force

400

Forces between objects with positive or negative charges

Electric force

500

• Makes things move in a circular path

Centripetal force

Newton's Laws

100

• The fastest speed something can fall

Terminal velocity

200

Force equals mass times acceleration

Newtons 2nd Law

300

An object at rest stays at rest, and an object in motion stays in motion

Newtons 1st Law

400

• is an object's resistance to changes in its motion

Inertia

500

For every action, there is an equal and opposite reaction

Newton's 3rd Law

Motion

100

• An upward force in liquids

Buoyancy 

200

How much matter is packed into a space

Density

300

• is the rate at which an object's velocity changes

Acceleration

400

•  is the ability to do work

Energy

500

The speed and direction of an object's motion

Velocity

Real-Life Examples

100

Causes the Earth to circle around the sun

Gravity 

200

• we couldn't walk or hold things if we didn't have

Friction

300

• A rocket speeding up as it takes off

Acceleration

400

A bowling ball has more _______ than a tennis ball

Mass

500

You _______ less on the Moon than on Earth

Weigh