Gravity and Friction Mr. Pecora

Reduces friction 

• Lubricant
• Unit of mass

A push or a pull on an object

• Force
• Gravity

Resists the motion of two surfaces that our touching

• Friction
• Force

A push or pull on one object by another object

• Contact force
• Electric force

Unit of force or weight

• Newton
• Kilogram

Applied without touching

• Noncontact force
• Contact force

Unit of mass

• Kilogram
• Newton

Makes hair stand on end

• Electric force
• Contact force

Makes a compass needle point north

• Magnetic force
• Contact force

Keeps you from floating away

• Gravity
• Magnetic force