Graphing Motion How can you find the speed from a distance-time graph?

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Presentation transcript:

Graphing Motion How can you find the speed from a distance-time graph? The slope of a line on a distance-time graph is speed.

Graphing Motion A distance-time graph is a good way to describe motion. Slope is the change in the vertical axis value divided by the change in the horizontal axis value. A steeper slope on a distance-time graph indicates a higher speed.

Graphing Motion

Graphing Motion

Graphing Motion

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Two velocities of an object are combined by using Assessment Questions Two velocities of an object are combined by using division of the larger velocity by the smaller velocity. addition of the two speeds. vector addition. numeric addition. ANS: C

Assessment Questions A kayak is moving across a stream 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? 1.3 km/h 5 km/h 7 km/h 12 km/h

Assessment Questions A kayak is moving across a stream 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? 1.3 km/h 5 km/h 7 km/h 12 km/h ANS: B

Assessment Questions The SI unit for speed of an airplane is miles per hour. True False

Assessment Questions The SI unit for speed of an airplane is miles per hour. True False ANS: F, kilometers per hour