Forces

Friction

• is a force that opposes motion between any surfaces that are touching

• Makes things move faster

• is never useful

• can not be reduced

Types of friction include

• Static, Sliding, Rolling and Fluid

• Sliding, grabbing, slipping and air resistance

• Rolling, falling, sweeping and spinning

• Fluid, solid, gaseous and gel

Gravity

• is only found on Earth

• is a force of attraction between things that have mass

• only effects people

• is a force or attraction between things that are large

The force of gravity depends on

• distance and mass

• distance and depth

• distance and shape

• distance and circumference

Conservation of energy

• energy can be created but not destroyed

• energy can not be created or destroyed

• energy can be destroyed but not created

• energy can be created and destroyed

What is a force?

• A push or pull on an object

• Something in Star Wars

• a push but not a pull on an object

• a pull but not a push on an object

Forces are measured in

• Newtons

• Grams

• Joules

• Energy

Balanced forces

• are equal in strength and do not change an objects motion

• are unequal in strength and change an objects motion

• are equal in strength and change an objects motion

• are unequal in strength and do not change an objects motion

Unbalanced forces

• are equal in strength and do not change an objects motion

• are unequal in strength and change an objects motion

• are equal in strength and change an objects motion

• are unequal in strength and do not change an objects motion

What type of force is shown?

• Balanced

• Unbalanced

• parallel

• horizontal