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Question 1

Newtons 1st law

Answer 1

An object will remain at rest or continue to travel at constant velocity unless acted upon by an external force

Question 2

Newtons 2nd law

Answer 2

The resultant force on an object is directly proportional to and in the same direction as its rate of change of linear momentum

Question 3

Newton 3rd

Answer 3

If a body A acts on a body B with a force F then the body B acts on body A with a force that is equal in magnitude but in the opposite direction to F

Question 4

Linear momentum

Answer 4

Mass x velocity (vector quantity)

Question 5

Net force in a body

Answer 5

rate of change of momentum

Question 6

Impulse of a force

Answer 6

The product of a force and the time for which it acts

Question 7

Principle of conservation of momentum

Answer 7

Within a closed system the total momentum remains constant

Question 8

perfectly elastic collision

Answer 8

a collision in which kinetic energy is conserved

Question 9

inelastic collision

Answer 9

a collision in which kinetic energy is not conserved

Question 10

radian

Answer 10

the angle which subtends an arc equal in length to the radius of a circle

Question 11

Centripetal acceleration

Answer 11

the acceleration towards the centre of a circle

Question 12

Centripetal force

Answer 12

the resultant force on an object travelling in a circle (which is directed towards the centre of the circle

Question 13

Newtons law of gravitation

Answer 13

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

Question 14

Gravitational field strength

Answer 14

force per unit mass

Question 15

Period

Answer 15

the time taken for one complete revolution

Question 16

Geostationary orbit

Answer 16

The orbit of an artificial satellite with a period of one day which always remains above the same point on the Earth’s equator

Question 17

Displacement

Answer 17

The distance and direction of an oscillating object from rest point

Question 18

Amplitude

Answer 18

the maximum displacement of an oscillating object from rest point

Question 19

period

Answer 19

The time taken for an object to complete one oscillation

Question 20

Frequency

Answer 20

The number of oscillations of a particle per unit time

Question 21

Angular frequency

Answer 21

The rate of change of angle expressed in radians per second( the product of 2pi and frequency)

Question 22

Phase difference

Answer 22

The fraction of an oscillation between two oscillating particles expressed in degrees or radians

Question 23

Simple harmonic motion

Answer 23

Motion of an oscillator whose acceleration is directly proportional to displacement and directed towards the equilbrium postion

Question 24

Pressure

Answer 24

Force per unit area

Question 25

Internal energy

Answer 25

The sum of the random distribution of kinetic and potential energies associated with the molecules of a system

Question 26

Specific heat capacity

Answer 26

The energy per unit mass of a substance to raise its temperature by one degree

Question 27

latent heat of fusion

Answer 27

The energy absorbed by a substance to change its state from solid to liquid with no change in temperature

Question 28

Latent heat of vapouristaion

Answer 28

The energy absorbed by a substance to change its state from liquid to gas with no change in temperature

Question 29

Boyle’s Law

Answer 29

The pressure exerted by a fixed mass of gas is inversely proportional to its volume provided the temperature remains constant

Question 30

I mole

Answer 30

contains 6.02 x10 23 particles