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LEARNING TARGETS
Calculate acceleration, given speed and time
Outline what happens on a speed/time graph
Deduce acceleration values from a speed/time graph
Task 1
Complete this practical, which will introduce you to comparing graphs of position, velocity, and acceleration for the same object.
Task 2
Try another technique for calculating the velocity of an object, the old-fashioned way with a timer and a meter stick.
Task 3
Use the car chase from the movies Drive to sketch a speed/time graph.
Use the car chase from the movie Drive to time when the car gets to different speeds.
Change speed to velocity and plot a graph of velocity against time. Use graph paper and a pencil. You should be using the time in the video to work out how long each segment lasts. See worksheet below.
Calculate the acceleration at each stage using the equation.
Acceleration = final velocity - starting velocity
time
The distance travelled is the area under the graph. How far did the car go in that time?
If a car accelerates from 20m/s to 86m/s in 5.2 seconds, what is its acceleration?
A motorbike takes 2.5 seconds to go from rest to 24 .8 m/s. what is its acceleration?
Danish thrown off the fourth floor reaches 12.6 m/s in 1.3 seconds. What is its acceleration?
A teacher sees a grade 9 student in the road and decides to stop. It takes their car 2.5 seconds to stop from 15.8 m/s, what is their deceleration?
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