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Physics M2 (foundation) > Foundations > Flashcards

Foundations Flashcards

1
Q

Define a physical quantity

A
  • property of an object or of a phenomenon that can be measured
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2
Q

State the 6 SI base units

A
  • length
  • mass
  • time
  • electric current
  • temperature
  • amount of substance
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3
Q

State the base unit and unit symbol for length

A
  • metre, m
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4
Q

State the base unit and unit symbol for mass

A
  • kilogramm, kg
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5
Q

State the base unit and unit symbol for time

A
  • second, s
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6
Q

State the base unit and unit symbol for electric current

A
  • ampere, A
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7
Q

State the base unit and unit symbol for temperature

A
  • kelvin, K
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8
Q

State the base unit and unit symbol for amount of substance

A
  • mole, mol
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9
Q

State the factor of peta (P)

A
  • 10^15
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10
Q

State the factor of tera (T)

A
  • 10^12
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11
Q

State the factor of giga (G)

A
  • 10^9
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11
Q

State the factor of mega (M)

A
  • 10^6
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12
Q

State the factor of kilo (k)

A
  • 10^3
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13
Q

State the factor of deci (d)

A
  • 10^-1
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14
Q

State the factor of centi (c)

A
  • 10^-2
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15
Q

State the factor of milli (m)

A
  • 10^-3
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16
Q

State the factor of micro (u)

A
  • 10^-6
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17
Q

State the factor of nano (n)

A
  • 10^-9
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18
Q

State the factor of pico (p)

A
  • 10^-12
19
Q

State the factor of femto (f)

A

*10^-15

20
Q

How can a derived unit be determined?

A
  • Worked out from the base units and equations relating derived quantities to the base quantity
21
Q

State some derived quantities

A
  • Force
  • Pressure
  • Energy / work done
  • Power
  • Electric potentail difference
  • Electric resistance
  • Electric charge
  • Frequency
22
Q

Force

A
  • Newton (n)
    *
23
Q

Pressure

A
  • Pascal (Pa)
    *
24
Q

Energy / work done

A
  • Joule (J)
    *
25
Q

Power

A
  • Watt (W)
26
Q

Electric potential difference

A
  • Volt (V)
27
Q

Electric resistance

A
  • Ohm ()
28
Q

Electric charge

A
  • Coulomb (C)
29
Q

Frequency

A
  • Hertz (Hz)
30
Q

Define scalar quantity

A
  • Has magnitude (size) but no direction
31
Q

Define a vector quantity

A
  • Has magnitude and direction
32
Q

Name some scalar quantities

A
  • length
  • mass
  • time
  • speed
  • temperature
  • volume
  • Energy
  • Potential difference
  • Power
33
Q

Name some vector quantities

A
  • Displacement
  • Velocity
  • Acceleration
  • Force
  • Momentum
34
Q

How is a vector quantity represented?

A
  • With a single arrowhead line
  • Length represents the magnitude of the vector, drawn to scale
  • Direction in which it points represents direction of vector
35
Q

Describe how you calculate the resultant of two parallel vectors

A
  • Where two vectors are parallel, you add them together to find the resultant force
  • The direction of the resultant is the same as the individual vectors but its magnitude is greater
36
Q

Describe how you calculate the resultant of two antiparallel vectors

A
  • Where two vectors are antiparallel, (one direction is positive and the other is negative) you add the vectors together to find the resultant
  • The magnitude and direction of resultant will depend on the magnitude of the two vectors
37
Q
A
  • Perpendicular vectors act at right angles to eachother
38
Q

Describe how you would calculate the resultant of two perpendicular vectors

A
  • The resultant vector can be found by either calculations or by a scale drawing of a vector triangle
    1. Draw a line to represent the first vector
    2. Draw a line to represent the second vector, starting from the end of the first vector
    3. To find the resultant vector, join the start to finish (vector triangle)
  • Since the angle is 90 you can also determine magnitude of resultant force using pythagros theorem
  • To find direction of the resultant force you can calculate the angle theta using SOHCAHTOA
39
Q
A
  • You can reverse the produce of adding two perpendicular vectors o spilt a vetoer into two perpendicular components
  • This is called resolving the vector - can be done using a scale drawing but more often vectors
40
Q
A
  • To resolve a force into the x and y directions the two components of the force are
    Fx = Fcos0
    Fy = fsin0
  • where 0 is the angle made with the x direction
41
Q
A
  • To add together two non perpendicular vectors, they all rely on constructing a clear vector triangle
42
Q

tech 1

A

scale diagram

43
Q

stech 2

A

calculations using coin and sine rules

44
Q

tech 3

A

calculation using vector resolution

45
Q

Describe how you would draw subtracting vectors

A

Physics M2 (foundation) (1 decks)

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