describing motion

what is speed

distance travelled by an object per unit time

what is average speed

speed calculated from total distance travelled divided by total time take

why can’t we say someone had a steady speed

we find the average which does not account for if they were increasing or decreasing

what is the SI unit for speed

m/s

what is the SI unit for distance

m

what is the SI unit for time

s

what is another common SI unit for speed

km/h

what two things do you usually have to measure to calculate speed

total time taken and distanced travelled between two points

what does this experiment do

calculate speed in a laboratory

what is a light gate

allows the speed of an object passing between them to be calculateed electronically

what is an interrupt card

allows the speed an object passing through a light gate to be calculated

what is the rearranged equation for distance

distance = speed * time

what is not the rearranged equation for distance

distance = speed/time

what is the rearranged equation for time

time = distance/speed

what is not the rearranged equation for time

time = distance * speed

what is going on in this graph

object has stopped

what is going on in this graph

constant speed

what is going on in this graph

constant speed returning to start

what is going on in this graph

acceleration

what is going on in this graph

deceleration

what is going on in this graph

constant speed

what is going on in this graph

constant speed

what is going on in this graph

acceleration

what is going on in this graph

deceleration

what is going on in this graph

increasing acceleration

which graph finds distance

speed-time

which graph finds speed

distance-time

how do you find the distance travelled

area under speed-time graph

how do you find speed

gradient of distance-speed graph

what two things do you need when calculating acceleration

time taken and change in velocity

what is the formula for acceleration

acceleration = change in velocity/time taken

what other way is more preferred for calculating acceleration

v-u/delta time

what are the SI units for acceleration

m/s²

how do you read 2m/s²

two metres per second per second

which graph do you use to find acceleration

speed-time graph

how do you find acceleration using a graph

gradient of speed-time graph

on a speed time graph, if the line is straight. What does that mean

changing velocity and no changing distance