Work and coservation of energy

Define work done, its equation, its regular and SI base unit

Product of the force and the distance travelled in the direction of the force, J, Joule, Nm, kgm²s^-2

W = Fd

W = work done, kgm²s^-2

F = force, kgms^-2

d = distance, m

What is the equations for work done using an angle?

W = Fdcosθ

W = Work done, kgm²s^-2

F = Force, N, kgms^-2

d = distance, m

What is energy?

The capacity to do work

State the conservation of energy

‘Energy cannot be created or destroyed, only transferred to other forms’

What is work done equal to?

Energy transferred

Define 1J

Amount of energy transferred when a force of 1N travels a distance of 1m in the same direction as the force

Describe gravitational potential energy

Energy of an object due its position in a gravitational field

Describe elastic potential energy

Energy stored as a result of a reversible change to its shape (stretched or pulled)

Describe chemical potential energy

Energy stored within the chemical bonds between atoms, its released when the atoms are rearranged

Describe nuclear potential energy

Energy stored within the nuclei of atoms, its released when the subatomic particles in the nuclei are rearranged

Describe electrical potential energy

Energy of electric charges due to their position in an electric field

Describe kinetic energy

Energy of a moving object with mass

Describe internal energy

The sum of the random potential and kinetic energies of atoms in a system

Describe light/electromagnetic energy

Energy of all electromagnetic waves, stored within oscillating electric and magnetic fields

Describe sound energy

Energy of mechanical waves due to the movement of atoms