1scalar quantity
a quantity with magnitude but no direction
2vector quantity
a quantity that has both magnitude and direction
3distance
physical length between two points, scalar
4displacement
distance between starting and final position, vector
5what formula is key for figruing out displacement?
pythagoras theorem
6speed
rate at which distance is covered, scalar
7instantaneous speed
the speed of an object at one instant of time
8average speed
average speed of whole journey
9average speed formula
distance/time
10km/h to m/s
divide by 3.6
11m/s to km/h
multiply by 3.6
12distance formula
speed x time
13time formula
distance/speed
14velocity
the speed and direction of a moving object, vector
15velocity formula
displacement/time
16distance-time graph
gradient = speed
17x-axis shows (distance-time)
time
18y-axis shows (distance-time)
distance
20displacement-time graph
gradient = velocity
21speed-time graph
gradient = acceleration
area = distance
22y-axis shows (speed-time)
speed
23acceleration
rate of change of velocity
24positive acceleration
speeding up
25negative acceleration
slowing down
26acceleration formula
final velocity-initial velocity/time
27acceleration units
m/s/s
28Newton's 1st law
An object at rest will remain this way unless it is acted upon by a force. An object that is moving will continue to move at the same speed and in the same direction unless an unbalanced force acts upon it.
29Newton's first law is the law of ____
inertia
30Newton's 2nd law
An object will accelerate in the direction of an unbalanced force acting upon it. The size of this acceleration depends upon the mass of the object and the size of the force acting.
31Newton's 2nd Law Formula
f(net)=ma
32Newton's 3rd law
For every action force there is an equal and opposite reaction force.