On a distance-time graph, an INCREASING DIAGONAL LINE represents what type of motion?
constant speed away from reference point
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What are the SI units for SPEED?
meters/second (m/s)
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A kayak is moving across a stream (at a right angle) that is flowing downstream at a velocity of 4 km/h. The kayak’s velocity is 3 km/h. What is the magnitude of the kayak’s velocity relative to the river bank?
5 km/h
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5
What does the slope of a line on a distance-time graph represent?
speed
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eraser
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How do speed and velocity differ?
speed is 'rate' of motion (distance traveled per time); velocity is speed and direction!
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What is the formula for calculating SPEED if given time and distance?
v = d / t
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What is the formula for calculating TIME if given speed and distance?
t = d / v
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Define SPEED
ratio of the distance an object moves to the amount of time.
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On a distance-time graph, a DECREASING DIAGONAL LINE represents what type of motion?
constant speed toward the reference point
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On a distance-time graph, a HORIZONTAL LINE represents what type of motion?
No motion (no change in distance over a period of time)
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5
What type of speed does an automobile's speedometer display?
instantaneous speed
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10
TRUE or FALSE: if a car travels around a gentle curve on a highway at 60 km/h, the velocity does not change.
FALSE - even at a constant speed, if direction changes then the object's velocity is changing.
