G484 Definitions

Front 1

Newton's first law (Equilibrium)

Back 1

An object remains at rest or continues moving with constant velocity unless a result force acts.

Front 2

Newton's second law (F=ma)

Back 2

Force acting on an object is proportional to the rate of change of it's momentum and acts in the same direction of this change.

Front 3

Newton's third law (Reaction force)

Back 3

If body A exerts a force on body B, then body B exerts an equal and opposite force on body A.

Front 4

Momentum

Back 4

Product of an objects mass and it's velocity. p=mv

Front 5

Impluse

Back 5

The change of momentum. Product of average force and the time for which it acts.

Front 6

Conservation of momentum

Back 6

Total momentum before a collision is equal to the total momentum after the collision provided no external force acts. (Always conserved).

Front 7

Elastic collisions

Back 7

KE and momentum conserved.

Front 8

Inelastic collision

Back 8

KE not conserved - energy loss. Total energy before and after remains the same, but some is lost from the system. Momentum is conserved.

Front 9

Radian

Back 9

Angle subtended by an arc length equal to the radius of the circle.

Front 10

Gravitation field strength

Back 10

Force per unit mass at a point in the gravitational field.

Front 11

Geostationary

Back 11

A satellite with an equatorial orbital period equal to the rotational period of the planet.

Front 12

SHM

Back 12

An oscillation in which the acceleration of an object is proportional it it's displacement from the equilibrium position and directed towards that position.

Front 13

Displacement

Back 13

Distance and direction of an object from it's equilibrium position.

Front 14

Amplitude

Back 14

Maximum displacement from it's equilibrium position.

Front 15

Period

Back 15

Time take for an object to perform one complete oscillation.

Front 16

Frequency

Back 16

Oscillations per second.

Front 17

Angular frequency

Back 17

Period expressed in radians.

Front 18

Phase difference

Back 18

The fraction of an oscillation between two oscillators expressed in radians.

Front 19

Pressure

Back 19

Force per unit area

Front 20

Internal energy

Back 20

Total sum of randomly distributed kinetic and potential energies associated with the particles of a system.

Front 21

SHC

Back 21

Energy required to raise the temperature of a 1kg mass by 1K.

Front 22

SLH

Back 22

Energy required to change the state of 1kg of substance at it's melting or boiling point.

Front 23

Boyle's law

Back 23

Pressure exerted by a fixed mass of gas at a constant temperature is inversely proportional to it's volume.

Front 24

Newton's law of gravitation

Back 24

Any two point masses attract each other with a force directly proportional to the product of their masses and inversely proportional to the square of their separation.

Front 25

Temperature

Back 25

Property which determine direction of heat flow.

Front 26

Heat

Back 26

Form of energy which flows.

Front 27

Brownian motion

Back 27

The random and jerky motion of particles.

Front 28

Angular displacement

Back 28

Angle through which an object moves in a circle.

Front 29

Damped motion

Back 29

Describes an oscillatory motion where amplitude decrease with time due to energy loss.

Front 30

Centripetal force

Back 30

Net force acting on an object moving in a circular motion towards the center.

Front 31

Centripetal acceleration

Back 31

Acceleration of an object moving in a circular motion direction towards the center.