Studied by 2 people
what is distance
length along the actual path travelled from start to finish
is distance vector or scalar
scalar
is displacement scalar or vector
vector
what does displacement and distance both measure
how far an object moved
what units do they use for distance and displacement
metres or m
what is speed
rate of change of distance
is speed scalar or vector
scalar
what is velocity
rate of change of displacement
what is the formula of speed
distance travelled / time taken
what is the formula of velocity
displacement / time taken
is velocity scalar or vector
vector
what is the unit for both speed and velocity
ms^-1
what is acceleration
rate of change of velocity
what is the formula of acceleration
change in velocity / time taken
what is the unit of acceleration
ms ^-2
what can cause acceleration
change in speed or change in direction
what happens when an object is slowing down
negative velocity
what is negative velocity
deceleration or negative acceleration
what are derived units
combining the units in a defining equation
what are the derived units for density
kg m^-3
what are the derived units for momentum
kg m s^-1
what are the derived units for force
kg m^-1 s^-2
what are the derived units for pressure
kg m² s^-2
what are the derived units for work
kg m² s^-2
what are the derived units for power
kg m² s^-3
what are the derived units for electrical charge
A s
what are the derived units for potential difference
kg m² A^-1 s^-3
what are the derived units for resistance
kg m² A^-2 s^-3
what is the special name for force
newton N
what is the special name for pressure
pascal Pa
what is the special name for work
joule J
what is the special name for power
watt W
what is the special name for electrical charge
coulomb C
what is the special name for potential difference
volt V
what is the special name for resistance
ohm Ω
what does homogeneous mean in this topic
composed of identical parts
why is being able to find homogeneity of equations good
it can be particularly useful after you have rearrange and equation
is a homogeneous equation correct
could be but doesn’t prove it
what does homogeneity of equations mean
base units of each part must be the same
what does the symbol T represent
tera
what does the symbol G represent
giga
what does the symbol M represent
mega
what does the symbol k represent
kilo
what does the symbol d represent
deci
what does the symbol c represent
centi
what does the symbol m represent
milli
what does the symbol μ represent
micro
what does the symbol n represent
nano
what does the symbol p represent
pico
what does the symbol f represent
femto
how much is a (what is its multiplier) for tera
10^12
how much is a (what is its multiplier) for giga
10^9
how much is a (what is its multiplier) for mega
10^6
how much is a (what is its multiplier) for kilo
10³
how much is a (what is its multiplier) for deci
10^-1
how much is a (what is its multiplier) for centi
10^-2
how much is a (what is its multiplier) for milli
10^-3
how much is a (what is its multiplier) for micro
10^-6
how much is a (what is its multiplier) for nano
10^-9
how much is a (what is its multiplier) for pico
10^-12
how much is a (what is its multiplier) for femto
10^-15
where do numbers and base units come in place
pure numbers do not have base units
what is the difference of 5m and 5.00m
5.00m is more accurate because it has more significant figures and is to the nearest centimetre
if your raw data is all 4 significant figures, how do you give your answer
4 significant figures
what is 4.62 in 1 significant figure
5
what is 0.00501 in 2 significant figures
0.0050
what is 3 × 10^8 in 3 significant figures
3.00 × 10^8
what is 169 in 2 significant figures
1.7 × 10²
what is a vector
a quantity with size(magnitude) and direction
what is a scalar
a quantity with size(magnitude) and no direction
scalar or vector? discance
scalar
scalar or vector? speed
scalar
scalar or vector? mass
scalar
scalar or vector? displacement
vector
scalar or vector? velocity
vector
scalar or vector? weight
vector
scalar or vector? pressure
scalar
scalar or vector? force
vector
scalar or vector? energy
scalar
scalar or vector? temperature
scalar
scalar or vector? momentum
vectors
scalar or vector? acceleration
vector
scalar or vector? volume
scalar
scalar or vector? electric current
vector
scalar or vector? torque
vector
scalar or vector? density
density
how can vectors be represented
length and direction of an arrow on a drawing
why can 4N + 4N give you 0N and/or 8N
force is a vector and adding them depends on direction of force
how do you add vectors on the same direction
simple F1 + F2
how do you add vectors going opposite direction
take one as positive and the other as negative and just add
how do you find the resultant of two vectors at 90 degree to each other
draw adjacent sides of a rectangle
what is the resultant on a 90 degree vector drawing
the diagonal
how do you find the magnitude of a 90 degree vector drawing
Pythagoras’ theorem
what d o you do when subtracting vectors
make one vector positive and the other negative
what do vector subtraction have in common with vector addition
when it is the same size acting in the opposite direction
how do you calculate the resultant of an object being acted on by more than two vectors
draw each vector head to tail until you get a shape. Draw a line from start to end point; that is your resultant
what is the resultant on a vector triangle
third side of a vector
what could you use to find the resultant of a vector triangle when Pythagoras doesn’t work
trigonometry, cosine rule, sine rule
what is a physical quantity
feature of something which can be measured
what are orders of magnitude of quantities
expressing its size or scale in powers of 10
