1. Equations Motion, Energy and Matter

Question 1

Efficiency

Answer 1

Useful energy / total energy supplied

Question 2

Change in GPE

Answer 2

Mass x GFS x Change in vertical height

Question 3

Kinetic energy

Answer 3

1/2 x mass x (speed)²

Question 4

Speed

Answer 4

Distance / time

Question 5

Wave speed

Answer 5

Frequency x Wavelength

Question 6

Period of a wave

Answer 6

1 / Frequency

Question 7

Resistance

Answer 7

Potential difference / Current

Question 8

Charge flowing at one time

Answer 8

Current x Time

Question 9

Energy transferred

Answer 9

Current x Potential difference x Time

Question 10

Total power

Answer 10

Energy transferred / Time

Question 11

Gradient

Answer 11

Change in Y (Y2-Y1) / Change in (X2-X1)

Question 12

Acceleration

Answer 12

Change in velocity / Time

Question 13

(Final velocity)² x (Initial velocity) ²

Answer 13

2 x Acceleration x Distance

Question 14

Weight

Answer 14

Mass x GFS (acceleration due to gravity)

Question 15

Force

Answer 15

Acceleration x Mass

Question 16

Momentum

Answer 16

Mass x Velocity

Question 17

Force of momentum

Answer 17

Change in momentum / Time

Question 18

Stopping distance

Answer 18

Braking distance x Thinking distance

Question 19

Celcius to Kelvin

Answer 19

Celcius + 273

Question 20

Velocity

Answer 20

change in displacement / time

Question 21

SUVAT

Answer 21

Displacement, Initial velocity, Final Velocity, Acceleration, Time

Question 22

Moment

Answer 22

Force x perpendicular distance

Question 23

Equillibrium

Answer 23

Total clockwise moments = total anticlockwise moments

Question 24

Density

Answer 24

Mass / Volume

Question 25

Momentum

Answer 25

Mass x Velocity

Question 26

Average resultant force

Answer 26

Change in momentum / TIme

Question 27

Impulse / Change in momentum

Answer 27

Force x Time

Question 28

Momentum of photons

Answer 28

Plancks constant / wave length

Question 29

Energy of photons

Answer 29

Plancks constant x frequency

Question 30

Work done

Answer 30

Force x Distance moved

Question 31

Specific heat capacity

Answer 31

Q = m x c x t Q = heat energy M = mass C = capacity T = temp

Question 32

Difference between a scalar and a vector quantity

Answer 32

A scalar only has magnitude whereas a vector has both magnitude and direction

Question 33

What does it mean by instantaneous speed

Answer 33

The speed of an object at that point in time

Question 34

What does it mean when velocity is constant

Answer 34

Then acceleration equals 0 and forces are opposite and equal

Question 35

Give examples of scalar quantities

Answer 35

Distance Time Density Pressure Mass Temperature Energy or work

Question 36

Give examples of vector quantities

Answer 36

Displacement Velocity Acceleration Force Magnetic field strength Momentum

Question 37

What is the centre of gravity

Answer 37

The point at which weight acts upon an object

Question 38

What does it mean by equillibrium

Answer 38

When the net moments equals 0 and the resultant forces equal 0

Question 39

Newtons 3rd law

Answer 39

Every action force has an opposite and equal reaction force acting within the same line

Question 40

Newtons 2nd law

Answer 40

F = m x a

Question 41

Newtons 1st law

Answer 41

An object will remain at rest or in constant ,motion unless an external force is exerted upon it

Question 42

What is the different between an elastic and non elastic collision

Answer 42

Elastic= all KE is conserved Non Elastic= KE is not conserved and is transferred to other forms

Question 43

What does the area under a force time graph represent

Answer 43

Impulse or the change in momentum

Question 44

Power equation

Answer 44

Energy transferred / time

Question 45

Give an example of a type of cake

Answer 45

Red velvet Carrot Coffee