Force, Motion, and Simple Machines

forces on an object that do not change the motion of the object

• balanced forces

• force

• motion

• lever

a push or pull that causes an object to move, stop, or change direction

• gravitational force

• force

• pulley

• lever

a force that causes objects with mass to attract each other

• gravitational force

• balanced forces

• pulley

• lever

how an object moves from one place to another

• gravitational force

• motion

• pulley

• lever

forces on an object that cause change in the motion of the object

• balanced forces

• unbalanced forces

• pulley

• motion

a flat surface set at an angle

• wedge

• incline plane

• pulley

• motion

a rigid bar pivoted on a fixed point

• wedge

• incline plane

• lever

• motion

a simple machine consisting of a wheel over which a rope or chain is pulled to lift heavy objects.

• wedge

• pulley

• lever

• motion

a type of fastener with a ridge wrapped around a cylinder

• wedge

• pulley

• lever

• screw

tools that make work easier

• wedge

• pulley

• simple machines

• screw