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Physics A Level > Chapter 2 Foundations of Physics > Flashcards

Chapter 2 Foundations of Physics Flashcards

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1
Q

What is the SI unit for length?

A

m Metres

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2
Q

What is the SI unit for mass?

A

kg Kilogram

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3
Q

What is the SI unit for time?

A

s Seconds

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4
Q

What is the SI unit for electric current?

A

A Amperes

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5
Q

What is the SI unit for temperature?

A

K Kelvin

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6
Q

What is the SI unit for amount of substance?

A

mol Mole

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7
Q

What is a physical quantity?

A

Something that can be measured

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8
Q

What is SI?

A

It is a standard system of units that is used by all scientists.

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9
Q

What is the order and magnitude for all the prefixes from x10^-15 to x10^15

A 
Peta = x10^15
Tera = x10^12
Giga = x10^9
Mega = x10^6
Kilo = x10^3
Deci = x10^-1
Centi = x10^-2
Milli = x10^-3
Micro = x10^-6
Nano = x10^-9
Pico = x10^-12
Femto = x10^-15
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10
Q

What are derived units?

A

These are units that can be worked out using the base units and equations relating derived quantities.

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11
Q

What is the equation for average speed?

A

Avg Speed = Distance / Time

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12
Q

What is the unit and derived unit for Force?

A

Newton (N) = kgms-2

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13
Q

What is the unit and derived unit for Pressure?

A

Pascal (Pa) = Nm-2

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14
Q

What is the unit and derived unit for Work done or Energy?

A

Joule (J) = Nm

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15
Q

What is the unit and derived unit for Power?

A

Watt (W) = Js-1

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16
Q

What is the unit and derived unit for Potential Difference?

A

Volt (V) = JC-1

17
Q

What is the unit and derived unit for Electrical Resistance?

A

Ohm (Ω) = VA-1

18
Q

What is the unit and derived unit for Frequency?

A

S-1

19
Q

What is a scalar quantity?

A

It is a quantity that has a magnitude but no direction

20
Q

What is a vector quantity?

A

It is a quantity with a magnitude and a direction

21
Q

Name scalar quantities (9 different quantities)

A 
Length
Mass
Time
Speed
Temperature
Volume
Energy
Potential Difference
Power
22
Q

Name vector quantities (5 vector quantities)

A 
Displacement
Velocity
Acceleration
Face
Momentum
23
Q

How are parallel vectors combined?

A

They are added

24
Q

How are antiparallel vectors combined?

A

You add them together but one must have a negative value so the result should be smaller

25
Q

How are two perpendicular vectors combined?

A

Pythagoras theorem is used

26
Q

On a vector diagram what does a) the length of the line and b) the direction of the line

A

a) The magnitude

b) the direction to which it acts

27
Q

What is resolving a vector?

A

This is when the problem is broken down into the x component and the y component

28
Q

Name the 3 methods to adding non perpendicular vectors?

A

Method 1: Scale diagram
Method 2: Using the sine and cosine rules
Method 3: Resolve each vector and combine

Physics A Level (27 decks)

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