It's all Relative
Speed & Velocity
Acceleration
Free, Free Fallin
Graphs, Graphs, Graphs
100
(Off-Topic to Fill Squares)
What is my spider's name?
Porkchop "Rosie Toes" Parker
100
What is the difference between Speed & Velocity?
Speed is a scalar quantity.
Velocity is a vector quantity
100
Define Acceleration.
Acceleration is the rate at which velocity changes with respect to time.
100
Define the term "Free Fall".
Motion under the influence of gravity only.
100
What does a straight, flat line on the Position vs. Time graph indicate?
It indicates a velocity of 0.
200
(Off-Topic to Fill Squares)
What is the Doctor's time/space vehicle from Doctor Who called?
T.A.R.D.I.S.
(Time And Relative Dimensions In Space)
200
What is the average speed of tricycle that travels 300 feet in 200 seconds?
1.5 ft/s
200
A car traveling at 25 mi/hr slows to a stop over a time of 2.5 s. What is the car's average acceleration?
-10 mi/hr/s or -10 mph/s
200
What acceleration do falling objects experience?
9.81 m/s2 (also accepted: 9.8 or 10)
200
The absolute value of the slope of the Position vs. Time graph is a measure of what?
Speed
300
Define "Frame of Reference"
Something you compare motion against, to determine speed.
300
What is the instantaneous velocity of a moving object with no acceleration and an average velocity of 5 m/s ,North?
5 m/s, North
300
A ball rolls from rest at an acceleration of +5 m/s2 for 3 s. What is its final velocity?
+15 m/s
300
An object falls from rest for 6.5 s. What is its instantaneous speed (in m/s)?
(hint: use v = at)
64 m/s
300
What does the slope of the Velocity vs. Time graph indicate?
Acceleration
400
Your car's odometer states that you are traveling at 25 mi/hr. What frame of reference is your car measuring your speed against?
The Earth
400
Is it possible for an object with constant speed to have a changing velocity? Why or why not?
Yes, because velocity deals with direction, an object can have a constant speed but also be changing direction and therefore changing its velocity.
400
A driver is accelerating at +3 m/s2. If his starting velocity is 1 m/s and his final velocity is 10 m/s, then how many seconds was he accelerating for?
3 seconds.
400
An object falls from rest for 6.50 s. What distance has it traveled (in m)?
(hint: use x = at2)
x = 414 m
400
What does the shaded area under the Velocity vs. Time graph indicate?
The total distance traveled.
500
Which has a greater relative speed?
A) A boy walking at 3 mi/hr with the earth as a frame of reference.
B) A boy walking at 3 mi/hr with a passing fighter jet (who is traveling at 300 mi/hr) as a frame of reference.
B) The boy walking from the point of view of the fighter jet.
500
Is it Speed or Velocity that is represented by "Displacement divided by time"?
Velocity = Displacement divided by time.
Speed = Distance divided by time.
500
True or False: An acceleration is always positive.
False. Negative acceleration is also called "deceleration"
500
On the moon, you drop a golf ball from a height of 1.0 meter and it takes 0.784 s to land. What is the acceleration due to the moon's gravity?
(hint: rearrange the "x = at2" equation)
a = 1.6 m/s2
500
For the particle described by the graph:
1) What is its average velocity?
2) What is its acceleration?
Bonus 500 pts: What distance has it traveled?
1) 2 m/s
2) 0 m/s2
Bonus) 8 m