Post on 02-Jan-2016
Acceleration
What does the word “acceleration” mean?
The change in velocity each second.
Acceleration
How many speeds ( or “velocities”) would you need to have to work out an acceleration?
2
Acceleration
What words mean “the speed at a moment in time”?
Instantaneous Speed
Acceleration
How did you measure “instantaneous speed”?
Pass an object through a light gate attached to a timer.
Then
“instantaneous speed = object length / time to cut beam”
Power SupplyTimer
X
Light gate
Acceleration
What letter did we use for “initial speed” ?
u
Acceleration
What letter did we use for “final speed” ?
v
Acceleration
What equation did we come up with for acceleration “a” ?
a = (v – u) / t
Measuring Acceleration
TASK SHEET
In your groups design an experiment to measure the acceleration of an object on a slope.
Report on your experiment as a group poster …
TITLE
AIM
METHOD (inc diagram)
MEASUREMENTS
Measuring Acceleration
Report on your experiment as a group poster …
TITLE
AIM
METHOD (inc diagram)
MEASUREMENTS (a few runs for an average)
TABLE OF RESULTS (with correct units!)
CALCULATIONS
CONCLUSION
IMPROVEMENT SUGGESTIONS
Measuring Acceleration Experiment
Timer t 1Timer t 2
Stopwatch
Measurements
Card length =
t1 =
t2 =
Stopwatch, t =
Calculations
u = card length / t1 =
v = card length / t2 =
a = (v – u) / t =
Measuring Acceleration Experiment
Timer t 1Timer t 2
Timer t 3