Physics P1 - Work done & conservation of energy

What is work done?

It is the force causing a motion multiplied by the distance travelled in the direction of the force.

What is the equation for work done?

force x distance x cos(angle)

What is work equal to?

Rate of energy transfer.

What is power?

The rate of energy transfer.

What is the area under a force-displacement graph equal to?

Work done.

What is efficiency?

It is a measure of how efficiently a system transfers energy.

What is the efficiency equation?

Efficiency = output / input

What is the principle of energy conservation?

Energy cannot be created or destroyed, just transferred from one form to another.

What is change of gravitational potential energy?

mass x gravity x height

What is change of kinetic energy?

Kinetic energy = 1/2 mass velocity ^2