starter find someone who can answer the questions on your cards get up and move around! every...
TRANSCRIPT
STARTER
FIND SOMEONE WHO• can answer the questions on your
cards• get up and move around!• Every question must be answered
by someone different• you are NOT allowed to ask
anyone on the same table as you!
What are the units of speed when:
Distance is measured in metres and time in seconds
Distance is measured in kilometres and time in hours
Distance is measured in metres and time in minutes
Pairs of cameras spot your number plate, start a timer, and then spot your number plate again leaving a zone
800m
The speed cameras record that a car takes 350 seconds to move between them. Calculate the average speed of the car. Show your working. Give the unit. 2.28 m/s
Distance against time graphs
distance
time
No movement?
distance
time
No movement
distance
time
Constant speed?
distance
time
Constant speed
distance
time
Constant speed
distance
time
The gradient of this graph gives the speed
Constant speed
distance
time
How would the graph look different
for a faster constant speed?
Constant speed
distance
time
fast
Constant speed
distance
time
fast
How would the graph look different
for a slower constant speed?
Constant speed
distance
time
fast
slow
Getting faster? (accelerating)
distance
time
Getting faster
distance
time
Examples
distance
time
A car accelerating from stop and then hitting a wall
distance
time
A car accelerating from stop and then hitting a wall
distance
time
Speed against time graphs
speed
time
No movement?
speed
time
No movement
speed
time
Constant speed?
speed
time
Constant speed
speed
time
Constant speed
speed
time
How would the graph look different
for a faster constant speed?
Constant speed
speed
time
fast
Constant speed
speed
time
fast
How would the graph look different
for a slower constant speed?
Constant speed
speed
time
fast
slow
Getting faster? (accelerating)
speed
time
Getting faster? (accelerating)
speed
time
Constant acceleration
Getting faster? (accelerating)
speed
time
The area under the graph gives the distance travelled
Example:
speed
time
A dog falling from a tall building (no air resistance)
speed
time
A dog falling from a tall building (no air resistance)
speed
time
A dog falling from a tall building (no air resistance)
speed
time
Area = height of building
Be careful!
distance
time
speed
time
No movement
distance
time
speed
time
Constant speed
distance
time
speed
time
Area = distance travelled
Constant acceleration
distance
time
speed
time
Area = distance travelled
Too easy? I have a challenge for you!
• Can you watch the following video clip and use a stopwatch to determine how far the car travelled?
• I will provide you with a stopwatch and a table to fill in!
Activity
Plot these results on a speed time graph, with time on the bottom axis (the x axis) and speed on the side axis (the y axis).
Label the points where there is a change in motion A,B,C,D,E,F,H,I,J and K.
Example: point A is at time 0 and speed 0.