module 1. kinematics

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