Motion Vocabulary
Distance/Displacement
Speed/Velocity
Acceleration
Conversions and Scientific Notation
100
_____________________ is the total length travelled by a particle.
Distance, d
100
Joe walks 3 km north, and then turns and walks 4 km east. What is his distance, AND will this be the same as his displacement?
Distance: 7 km
No
100
Speed is a _____________, like 25 mi/hr, whereas velocity is a _______________, like 25 mi/hr north
Scalar, Vector
100
True or false: when velocity and acceleration are in opposite directions, the object will speed up.
False
100
How many milligrams are in one gram?
1000 mg
200
______________________ is the difference between a particle's initial position and final position, or the straight-line distance from its starting point
Displacement, ∆x
200
True or False: Displacement depends upon the path taken, whereas distance does not.
False
200
Calculate the speed of a dog running through a field if he is covering 23.7 meters in 54 seconds.
0.44 m/s
200
A car is traveling with a velocity of 20.0 m/s, and then increases its velocity to 60 m/s after 8 seconds. What is the car's acceleration?
5 m/s2
200
How many milliliters are in 50 liters?
50,000 mL
300
A _________________ is a numerical quantity, plus its associated unit
Scalar
300
You run twice around a 1000 meter track, and end up back at your starting point. What is your distance? What is your displacement?
Distance: 2000 meters
Displacement: 0 meters
300
A baseball travels 49 meters at the speed of 15 m/s before being caught. What amount of time was the baseball traveling for?
3.3 seconds
300
You start at rest, then begin riding a unicycle down a hill. You're accelerating at 4.0 m/s2 for 15 seconds. What is your final velocity?
60 m/s
300
What is 6,785 in scientific notation?
6.785 x 103
400
A _______________ is a numerical quantity plus its associated unit and a direction
Vector
400
Bob walks 200 kilometers north, then turns around and walks 500 kilometers south. Finally, he walks 30 kilometers north again. What is his distance traveled? What is his displacement?
Distance: 730 km
Displacement: -270 km, or 270 km south of origin
400
A woman jogs 45 meters north, then walks back 30 meters south toward her original position. The entire trip takes 120 seconds. What was her velocity?
0.125 meters per second
400
If a car starts at rest and then accelerates at a rate of 5 m/s2 for 6.25 hours, what is the change in velocity (∆v) in meters per second?
112500 m/s
400
What is 3.45 x 10-6 in normal notation?
0.00000345
500
___________________ is the rate of change of a particle's velocity
Acceleration
500
Fred walks his dog 25 blocks north, and then turns and walks 64 blocks east. What is his distance? What is his displacement?
Distance: 89 blocks
Displacement: 68.7 blocks
500
Which object has a greater velocity: a ball rolling down a 3 meter hill in 6 seconds, or a fish swimming upstream and covering 5.4 meters in 0.4 minutes?
Ball (0.56 m/s vs. 0.225 m/s)
500
According to the slope of the line, what is the object’s acceleration between 5 and 15 seconds? (Slope equation = y2-y1x2-x1)
1.6 m/s2
500
Convert 15 millimeters to miles
0.0000093 miles