Marvelous Motion
This is calculated when you take the total distance traveled and divide by the total time
Average Speed
Kim travels 300 miles in 4 hours. What is her average speed?
75mi/hr
What does it mean if an object has a negative acceleration?
What does the slope on a velocity vs. time graph tell you?
Acceleration
A rocket moving at a speed of 710 m/s can travel very far in 15 seconds. Determine how far.
10,650 m
This describes an object's speed and direction
Velocity
A car travels 2,000 mi at a constant speed of 70 mi/hr. How long did the trip take?
28.6 hrs
A skier is going downhill at a speed of 9 m/s. The hill gets steeper and his speed increases to 18m/s in 3 s. What is his acceleration?
3 m/s2
Sketch a distance vs. time graph of an object that is not moving.
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If a go-cart slows down from a speed of 20m/s to 15 m/s in 0.92 s, what is its acceleration?
- 5.43 m/s2
The slope on a distance vs. time graph tells you ____.
Speed
Rate of change in velocity is known as _________
Acceleration
A bus traveling 12 m/s comes to a stop after 6 seconds. What was its acceleration?
-2 m/s2
Sketch a distance vs. time graph of an object that is moving at a constant speed.
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The speed that shows up on the speedometer on a car is known as what?
Instantaneous speed
A runner jogs 60m on a track towards the finish line, then turns and runs back 20m. What is her distance and her displacement?
Distance= 80m
Displacement = 40m towards the finish line
Find the velocity of a truck that travels 250 miles North to NYC in 5 hours.
50 mi/hr North
What is the acceleration of an object with a constant velocity?
Show the difference between how a distance vs. time and a velocity vs. time graph show an object that is speeding up.
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What does a flat line on a velocity vs. time graph mean?
The object is moving at a constant speed
How is it possible to have a constant speed but a changing velocity?
Change in Direction
A babysitter is pushing a stroller from rest and accelerates at a rate of 0.05 m/s2. What is the velocity of the stroller after is has traveled for 285s?
14.25 m/s
Show the difference between how a distance vs. time and velocity vs. time graph show an object that is slowing down.
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Tamra rides her bike 10 blocks north and then turns and rides 5 blocks east. What is her distance and displacement?
Distance = 15 blocks
Displacement= 11.18 blocks NE