Defined as a constant rate of change of velocity.

The amount of matter in a body.

The gravitational force acting on an object that has mass.

A region in which a mass experiences a force due to gravitational attraction.

Gravitational field strength

Defined as the gravitational force per unit mass placed at that point.

Defined as mass per unit volume.

Defined as the force acting per unit area.

Moment of a force (torque)

The product of the force and the perpendicular distance from the pivot to the line of action of the force.

States that when a body is in equilibrium, the sum of the clockwise moments about a pivot is equal to the sum of the anticlockwise moments about the same pivot.

An imaginary point where the entire weight of the object seems to act.

Principle of conservation of energy

States that energy cannot be created or destroyed; it can be transferred from one energy store to another.

Work done by a constant force

The product of the force and the distance moved by the object in the direction of the force.

Defined as the work done per unit time.

An energy store made up of the total kinetic energy and total potential energy between particles and the system.

The process of energy transfer through the passing of vibrational motion from one particle to another.

The process of energy transfer by means of convection currents of a fluid due to a difference in density.

The process of energy transfer by electromagnetic waves, not requiring a medium.

A wave with a direction of vibration perpendicular to the direction of wave travel.

A wave with a direction of vibration parallel to the direction of wave travel.

The maximum magnitude of displacement from a wave's rest position.

The highest points of a transverse wave.

The lowest points of a transverse wave.

The shortest distance between two points in phase along the wave's direction.

The time taken to produce one complete wave.

The number of complete waves produced per second.

The distance travelled by a wave per second.

An imaginary line joining all adjacent points that are in phase.

The angle between the incident ray and the normal.

The angle between the reflected ray and the normal.

An imaginary line perpendicular to the surface at the point of incidence.

The angle between the refracted ray and the normal.

The ratio of the speed of light in vacuum to the speed of light in the medium.

The distance between the optical centre and the principle focus point.

The rate of flow of electric charge.

Electromotive Force (e.m.f)

The work done by the source in driving a unit charge round a complete circuit.

Potential Difference (p.d.)

The work done in driving a unit charge through a component in an electric circuit.

The ratio of the potential difference across a component to the current flowing through it.

Connected to a high voltage and delivers current to the appliance.

Completes the circuit by providing a return path to the supply for the current, usually at zero volt.

Earth Wire (Green and Yellow)

A low-resistance wire usually connected to the metal casing of appliances.

The region in which the force of magnetism acts.

Atoms of the same element with the same number of protons but different number of neutrons.

A random process by which an unstable atomic nucleus loses energy by emission of radiation or particles.

The time taken for half the nuclei of a radioactive nuclide in any sample to decay.

Science Physics Definition 5086 Flashcards

Student preview

51 questions

Show all answers

1.

FLASHCARD QUESTION

Front

Physical quantity

Back

A quantity that can be measured, consisting of a numerical magnitude and a unit.

2.

FLASHCARD QUESTION

Front

Period of a simple pendulum

Back

The time taken for one complete oscillation.

3.

FLASHCARD QUESTION

Front

Scalar quantities

Back

Physical quantities that have only magnitude.

4.

FLASHCARD QUESTION

Front

Vector quantities

Back

Physical quantities that have both magnitude and direction.

5.

FLASHCARD QUESTION

Front

Speed

Back

Defined as the rate of change of distance.

6.

FLASHCARD QUESTION

Front

Velocity

Back

Defined as the rate of change of displacement.

7.

FLASHCARD QUESTION

Front

Acceleration

Back

Defined as the rate of change of velocity.

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