Physics Chapter 5 Work Done

Define work done

The product of the magnitude of the force and the distance moved by the object in the direction of the force - J/Joules

Define kinetic energy

The energy associated with the motion of an object with mass. The SI base unit is kg•m²•s⁻².

Define Gravitational Potential Energy.

The energy of an object due to its position in a gravitational field. =mgh

Define Elastic Potential Energy.

The energy stored by an object as a result of a reversible change in its shape.

State the principle of conservation of energy.

In a closed system, energy cannot be created or destroyed but only transferred from one form to another.

The rate of work done is equal to ______.

Power

What is efficiency?

Efficiency (%) = (Useful output power/Total input power) x 100