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Physics > 1. Equations Motion, Energy and Matter > Flashcards

1. Equations Motion, Energy and Matter Flashcards

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1
Q

Efficiency

A

Useful energy / total energy supplied

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2
Q

Change in GPE

A

Mass x GFS x Change in vertical height

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3
Q

Kinetic energy

A

1/2 x mass x (speed)²

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4
Q

Speed

A

Distance / time

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5
Q

Wave speed

A

Frequency x Wavelength

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6
Q

Period of a wave

A

1 / Frequency

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7
Q

Resistance

A

Potential difference / Current

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8
Q

Charge flowing at one time

A

Current x Time

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9
Q

Energy transferred

A

Current x Potential difference x Time

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10
Q

Total power

A

Energy transferred / Time

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11
Q

Gradient

A

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

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12
Q

Acceleration

A

Change in velocity / Time

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13
Q

(Final velocity)² x (Initial velocity) ²

A

2 x Acceleration x Distance

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14
Q

Weight

A

Mass x GFS (acceleration due to gravity)

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15
Q

Force

A

Acceleration x Mass

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16
Q

Momentum

A

Mass x Velocity

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17
Q

Force of momentum

A

Change in momentum / Time

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18
Q

Stopping distance

A

Braking distance x Thinking distance

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19
Q

Celcius to Kelvin

A

Celcius + 273

20
Q

Velocity

A

change in displacement / time

21
Q

SUVAT

A

Displacement, Initial velocity, Final Velocity, Acceleration, Time

22
Q

Moment

A

Force x perpendicular distance

23
Q

Equillibrium

A

Total clockwise moments = total anticlockwise moments

24
Q

Density

A

Mass / Volume

25
Q

Momentum

A

Mass x Velocity

26
Q

Average resultant force

A

Change in momentum / TIme

27
Q

Impulse / Change in momentum

A

Force x Time

28
Q

Momentum of photons

A

Plancks constant / wave length

29
Q

Energy of photons

A

Plancks constant x frequency

30
Q

Work done

A

Force x Distance moved

31
Q

Specific heat capacity

A

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

32
Q

Difference between a scalar and a vector quantity

A

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

33
Q

What does it mean by instantaneous speed

A

The speed of an object at that point in time

34
Q

What does it mean when velocity is constant

A

Then acceleration equals 0 and forces are opposite and equal

35
Q

Give examples of scalar quantities

A

Distance
Time
Density
Pressure
Mass
Temperature
Energy or work

36
Q

Give examples of vector quantities

A

Displacement
Velocity
Acceleration
Force
Magnetic field strength
Momentum

37
Q

What is the centre of gravity

A

The point at which weight acts upon an object

38
Q

What does it mean by equillibrium

A

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

39
Q

Newtons 3rd law

A

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

40
Q

Newtons 2nd law

A

F = m x a

41
Q

Newtons 1st law

A

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

42
Q

What is the different between an elastic and non elastic collision

A

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

43
Q

What does the area under a force time graph represent

A

Impulse or the change in momentum

44
Q

Power equation

A

Energy transferred / time

45
Q

Give an example of a type of cake

A

Red velvet
Carrot
Coffee

Physics (16 decks)

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