Forces and Motion

a force that slows down moving things

• momentum

• friction

• inertia

• work

the tendency for an object to resist change in the direction or speed of its motion

• inertia

• magnetic field

• potential energy

• reaction

an equal, opposite response to a force being applied

• kinetic energy

• gravity

• reaction

• repel

the rate of movement in a certain direction

• momentum

• speed

• velocity

• force

the strength or force that keeps something moving

• kinetic energy

• momentum

• motion

• heat energy

the energy a body has because of its position, electrical charge, or structure; stored energy

• potential energy

• magnetism

• electricity

• kinetic energy

the force that pulls things toward the center of Earth or any other object that has mass

• inertia

• electromagnetism

• weight

• gravity

What is the opposite of repel? The answer starts with 'a'.

What is mass?

• how heavy something is

• the amount of matter in something

• energy that pulls things down

• low pitch sound energy

a machine that turns potential and kinetic energy into electricity

• generator

• engine

• piston

• motor