Science 20F Review for test
IN MOTION
Unit Test Review
Displacement – 2 marks
You will be asked to label a number line and find the displacement of a car using vectors.
Conversions – 2 marks
km – m km/h – m/s m/s – km/h cm – m
Speed/Distance/Time – 5 marks
Word problems solving for all three, you must know how to solve for each given the other two variables.
Acceleration – 4 marks
You are required to solve word problems using the formula for acceleration. The second question requires you to convert km/h to m/s and then find the acceleration.
Philosophers – 2 marks
Match the following philosophers, Aristotle, Descartes, Galileo, Newton with their major scientific contributions.
Newton’s First Law – 3 marks
What is Newton’s First Law? Give an example. How does it explain the “second collision” in a car accident?
Inertia – 2 marks
What was the conclusion from the lab involving speed and the unrestrained occupant. Why is this relevant information when driving a vehicle?
Forces and Motion – 2 marks
Remember the lab using the cart, pulley and mass system. What was the conclusion about mass and acceleration? What was the conclusion about force and mass?
Newton’s Third Law – 4 marks
What is Newton’s Third Law? Label 3 action-reaction pairs.
Momentum – 4 marks
Why is it important to know an objects momentum? Fill in a chart requiring you to find the momentum of four objects.
Impulse – 2 marks
Give an example of large/small forces applied over a short/long time.
Cushioning Devices – 4 marks
Give two examples of cushioning devices used in motor vehicles. Include the scientific principle behind them.
Conservation of Energy – 2 marks
Define conservation of energy and explain why it is important.
Braking Distance – 5 marks
Calculate braking distance using different frictional constants. Calculate the total stopping distance for a car giving velocity and reaction time.
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