A push or pull

• Magnetism

• Force

• Friction

• Gravity

Forces are equal; object is not moved

• Force

• Unbalanced Forces

• Balanced Forces

• Lubrication

Forces are not equal; object moves in one direction

• Unbalanced forces

• Velocity

• Magnetism

• Gravity

The closer an object is, the ____________ the magnetic force.

• greater

• lesser

Like poles __________________ each other

• attract

• repel

Which of these is not a lubricant.

• oil

• grease

• sand

• water

A change in direction or speed

• gravity

• friction

• motion

• velocity

The ______________ the surface is, the more friction there will be.

• rougher

• smoother

The force of Earth's gravity keeps the _____ moving around the Earth.

• sun

• moon

What can you add to reduce friction?

• magnets

• lubricants

• gravity

• velocity