Motion and Forces

a force that pulls things to the ground is

• gravity

• air resistance

a force that acts when two surfaces rub together is

• gravity

• friction

the force of air pushing against something

• gravity

• air resistance

a push or pull is

• force

• pulley

when a force is applied to an object is

• gravity

• work

a machine that will make work easier is

• a simple machine

• friction

how much gravitational pull an object has on Earth is

• speed

• weight

how fast an object is moving is

• weight

• speed