Studied by 30 people
examples of scalars
distance, mass, speed, energy, time, volume
examples of vectors
displacement, velocity, acceleration, force, position
what are the SI units
length: metres (m) time: seconds (s) mass: kilograms (kg)
what is the difference between distance and displacement
Distance is the total length of the actual path between two points. Displacement is the length and direction of a straight line between starting and ending points.
what is speed
The distance an object travels in a given time interval
what is average speed
distance travelled along an objects path divided by the time it takes to travel that distance
what is velocity
how far an object has been displaced in a given time interval
what is average velocity
displacement of an object divided by the time it takes to travel this distance
what is the velocity equation
velocity = displacement/time
what is the speed equation
speed = distance/time
what is instantaneous velocity
the velocity of an object in motion at a specific point in time
what is acceleration
The rate at which velocity changes
what is average acceleration equation
change in velocity/change in time
what is the acceleration equation
a=vf-vi/t
displacement/time graphs show: (directly, slope, horizontally straight line, area under graph)
directly: displacement at given time slope: denotes object's velocity, straight = constant horizontally straight line: v = 0m/s area under graph: n/a
velocity/time graphs show: (directly, slope, horizontally straight line, area under graph)
directly: velocity at given time slope: denotes the object's acceleration horizontally straight line: a = 0m/s area under the graph: distance the object has moved from origin
what is a frame of reference
a standard relative to which motion and rest may be measured
what is the formula for relative velocity? (same for 1D and 2D)
Vr = Vo - Vd
where r is the relative velocity of the observer relative ro the distance object (o relative to d)
o is the observer
d is the distant object
list the suvat equations?
s = ut + 1/2*at^2 v = u + at v^2 = u^2 + 2as
what are the suvat equations used for
when a is constant and v is changing
what does suvat stand for
S - displacement U - initial velocity V - final velocity A - acceleration T - time
