The unit used for measuring force.

Work requires motion and depends on ____________.

Many mechanical devices are combinations of two or more of the _____ different simple machines.

The two types of potential energy.

As an object heats up, its particles move __________.

The overall force acting on an object.

They change the size of a force needed, the direction of a force, or the distance over which a force acts.

A ramp is an example of this simple machine.

PE = mgh

Heat flows from __________ to ___________.

This is what occurs when an unbalanced force acts on an object.

These can both be used as units of power.

This simple machine has threads.

The energy stored in chemical bonds.

Occurs when particles of matter move farther apart and temperature increases.

A force that opposes the motion of an object.

This is the force you exert on a machine.

This is the reason we use machines.

Energy that travels through space in the form of waves

Used to measure changes in thermal energy.

The type of friction occurring when a skater glides across the ice.

This is the force exerted by a machine.

This is equal to the number of rope sections supporting the load being lifted in a pulley system.

The process of changing energy from one form to another..

Occur in nature as ocean currents and weather systems.