P1 - ENERGY STORES AND TRANSFERS

physics

Name the 8 energy stores?

Kinetic, thermal, chemical, gravitational potential, elastic potential, electrostatic, magnetic and nuclear.

What is kinetic energy?

The energy an object has because it is moving

What is Gravitational Potential Energy?

The energy an object has because of its height above the ground

What is elastic potential energy?

The energy an elastic object has when it is stretched or compressed

What is thermal energy?

Energy an object has because of its temperature (the total potential and kinetic energy of the particles in the object)

What is chemical energy?

energy that can be transferred by chemical reactions involving foods, fuels, and the chemicals in batteries

What is nuclear energy?

Energy stored in the nucleus of an atom

What is magnetic energy?

The energy a magnetic object has when it is near a magnet or in a magnetic field

What is electrostatic energy?

The energy a charged object has when near another charged object

What are the four energy transfers?

Heating Waves Electricity Forces

Describe heating as an energy transfer?

Energy is transferred from one object to another object with a lower temperature

Describe waves as an energy transfer?

Waves can transfer energy by radiation

Describe electricity as an energy transfer?

When an electric current flows it can transfer energy

Describe forces as an energy transfer?

Energy is transferred when a force moves or changes the shape of an object

What is the equation for gravitational potential energy?

Mass x height x gravitational field strength

What is the equation for Kinetic energy?

0.5 x mass x speed^2

What is the equation for power ?

Work done / time OR Energy transferred / time

How do you calculate work done (two ways)?

Force x distance and Energy Transferred

How do you calculate elastic potential energy?

0.5 x spring constant x extension^2

What is the equation for efficiency?

Useful energy output / total energy input