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4 cards from this section. Quick, good the night before a test.
What is a scalar quantity? Provide an example.
Think of quantities that give you a size in terms of numbers.
Is time a scalar or vector quantity?
Does time tell you a direction?
Which of the following is a scalar quantity?
Think about which term lacks a direction.
Is velocity a vector quantity?
Remember that vectors need a direction.
Two forces of 10 N and 20 N are applied in opposite directions. What is the net vector force?
Think about how opposing forces combine.
Calculate the resultant velocity if a boat moves 30 km/h north and then changes direction to 40 km/h east.
Use the Pythagorean theorem for calculating resultant velocities.
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