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
It is slowing down
What does the slope on a velocity vs. time graph tell you?
Acceleration
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
This describes an object/s speed and direction
Velocity
A car travels 2000 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.
3m/s^2(^ represents the exponent)
Sketch a distance vs. time graph of an object that is not moving.
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|_ _ _ _ _ _ this is how is should somewhat look like.
The speed that shows up on the speedometer on a car is known as what?
Instantaneous speed
The slope on a distance vs time graph tells you
Speed
Rate of chage 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.
The graph should go up from (0,0) diagonally.
What does a flat line on a velocity vs. time graph mean?
The object is moving at a constant speed.
A runner jogs 60m on a track towards the finish line, then turns and runs back 20m. What is her distance and 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?
0
how is a distance vs. time graph graphed if it is slowing down.
Up and curves right.
Tamra rides her bike 10 blocks north and then turns and rides 5 blocks east. What is her distance and displacement?
Displacement = 11.18 blocks NE
Distance = 15 blocks
Find the runners speed if they ran 8 meters in 4 seconds.
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
A rocket moving at a speed of 710 m/s can travel very far in 15 seconds. Determine how far.
10,650 m
What is the massof an elephant if it is moving at a velocity of 10 N and has a momentum of 100kg*m/s^2
10kg