physics definitions

Work energy principle

When an object accelerates there is a change in its velocity and hence , a change in its kinetic energy

Faradays law of electromagnetic induction

The induced emf in a conductor is directly proportional to the rate of change of magnetic flux

The motor effect

A current carrying conductor in a magnetic field will experience a force due to the inter-action between the applied magnetic field and the magnetic field around the current carrying conductor

Law of conservation of mechanical energy

The total mechanical energy in a isolated system remains constant

Power

The rate at which work is done

Free fall

The uninterrupted motion of a falling object in the absence of air resistance where only gravitational force acts on the object

Momentum

The product of an objects mass and its velocity

Linear momentum is a vector quantity with the same direction as the velocity of the object of mass

Newton’s second law of motion in terms of momentum

The resultant force acting on an object is equal to the rate of change of momentum of the object in the direction of the resultant force

Impulse

The product of the resultant force acting on an object and the time over which the resultant force acts

Law of conservation of momentum

The total linear momentum in an isolated system remains constant (is conserved )

Newtons first

A body will remain in its state of rest if motion at constant velocity unless a resultant force acts on it

Inertia

The resistance of an object to any change in its state at rest or uniform motion in a straight line

Newtons second

When a resultant force acts on an object, the object will accelerate in the direction of the force at an acceleration directly proportional to the force and inversely proportional to the mass of the object

Newtons third

When one body exerts a force on a second body, the second body exerts a force of equal magnitude in the opposite direction on the first body

EMF

The max energy provided by a battery per unit charge passing through it

Coulomb’s law

The magnitude of the electrostatic force between two point electric charges is directly proportional to the product of the magnitudes of each of the charges and inversely proportional to the square of the distance between the two charges

Electric field

The space around an electrically charged object in which other electrically charged objects would experience an electrostatic force

Doppler effect

The change in frequency of the sound detected by a listener, because the sound and the listener have different velocities relative to the medium of sound propagation

Newtons universal law of gravity

Each body in the universe attracts every other body with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres