radioactivity

acceleration

motion

distance, displacement, speed, velocity

quantities

vector

have magnitude (size) and direction

force

velocity

displacement

weight

acceleration

momentum

scalar

have magnitude and no direction

speed

distance

mass

energy

temperature

time

how far on object has moved

measures distance and direction in straight line from starting to finishing point

how fast you're going with no regard to direction

speed in given direction

typical speeds for transport methods

walking

running

cycling

cars in built up area

cars on motorway

trains

aeorplanes

ferries

wind speed

sound in air

31m/s

5.5m/s

1.4m/s

3m/s

13m/s

340m/s

15m/s

55m/s

250m/s

5-20m/s

change in velocity in certain amount of time

constant acceleration = uniform acceleration

distance/time graphs

parts of distance/time graph

gradient (slope)

flat sections

curves

curve getting steeper

levelling off curve

speed of object

represent acceleration

slowing down

stopped

speeding up

if graph is straight line, speed equal to gradient

if graph is curved, to find speed at certain time, draw tangent to curve at the point, then find gradient of line

velocity/time graphs

parts of velocity/time graph

gradient

flat section

uphill sections (/)

downhill sections ()

curve

deceleration

acceleration

steady speed

changing acceleration

(picture)

area under section of graph is equal to distance travelled in time interval