Marvelous Motion
This is calculated when you take the total distance traveled and divide it by the total time.
Average Speed
Kim travels 300 miles in 4 hours. What is her average speed?
What does it mean if an object has a negative acceleration?
It is slowing down.
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 18 m/s in 3 s. What is his acceleration?
3 m/s2
Sketch a distance vs. time graph of an object that is not moving.
Flat Slope
If a go-cart slows down from a speed of 20 m/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.
Constant Slope
The speed that shows up on the speedometer on a car is known as what?
Instantaneous Speed
A runner jogs 60 m on a track towards the finish line, then turns and runs back 20 m. What are her distance and her displacement?
Distance = 80 m
Displacement = 40 m towards the finish line
Find the velocity of a truck that travels 250 miles North to NYC in 5 hours.
50 mi/hr to the North
What is the acceleration of an object with a constant velocity?
0
Show the difference between how a distance vs. time and a velocity vs. time graph show an object that is speeding up.
Distance vs Time - Curved Up
Velocity vs Time - Constant Slope
What does a flat line on a velocity vs. time graph mean?
The object is moving at a constant speed.
Find the speed of the runner whose motion is depicted in the graph to the right. (CHECK DOCS)
2 m/s
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 it has traveled for 285 s?
14.25 m/s
Show the difference between how a distance vs. time and a velocity vs. time graph show an object that is slowing down.
Distance vs Time - Curved Toward the Top
Velocity vs Time - Constant Slope Downward
Tamra rides her bike 10 blocks north and then turns and rides 5 blocks east. What are her distance and displacement?
Distance = 15 blocks
Displacement = 11.18 blocks NE