1-D Kinematics Practice Test
Review for the First Unit Test: 1-D Kinematics
Complete the following Chart:
|Quantity (and description) |Variable |Unit |
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How do these compare?.....
Average Velocity Instantaneous Velocity Constant Velocity
Are velocity and acceleration the same?
What did we learn from the first lab?
• Moving objects....
• An object moving at constant velocity...
• An object that is accelerating ...
• Motion can be represented graphically on a position vs. time graph.....
What did we learn from the second lab?
A motion diagram (particle diagram) a. . . . . . . . . . .
b. .. . . . . . .
c. . . . . . . . ..
Motion of an accelerating object can be represented graphically on a velocity vs. time graph.
Objects speed up as the fall because of gravity. Acceleration due to gravity on Earth is 9.8 m/s2.
1-D Kinematics Practice Test General Physics O’Brien
Directions: For problems 1 – 6: Make a table identifying the quantity with the given/known values and units, write out the equation, substitute values into the equation, and write the answer with units.
1. Paul is able to run once around the track (400 m) in 58.0 s. Calculate Paul’s average velocity. (6.9 m/s)
2. A cyclist pedaling at 12 m/s speeds up to 18 m/s in 3 seconds. What is the cyclist’s average velocity during the acceleration? What is the cyclist’s change in velocity? Calculate the rate of acceleration.
(15 m/s, 6 m/s, 2 m/s2)
3. Alison walks 10 m down the hall way in 20 s, then stops and chats with her friend for 15 s, then trots 35 m to the classroom in 25 s. What is Alison’s average velocity? ( (find total distance; find total time) ave. vel = 0.75 m/s)
4. A plane landing on a runway at a speed of 90.0 m/s comes to a stop over a distance of 1500 m. a. What is the acceleration of the plane? b. How long does it take the plane to stop? (-2.7 m/s2; 33.3s)
5. After accelerating at a rate of 5 m/s2 for 4.2 s, a race car reaches a velocity of 53.3 m/s. a. How fast was the race car going before the acceleration? b. How far does the car travel during the acceleration?
(32.2 m/s; 180 m)
6. A super ball is dropped from a height of 4.62 m. a. Determine velocity of the super ball just before it hits the ground. b. How long does it take for the super ball to fall? (9.52 m/s; .97 s)
7. Refer to the position vs. time graph for
two objects that are moving in a straight
line, parallel to each other. A is represented
by the straight line, B is represented by
the curved line.
a. Compare the motion of the two objects.
b. When does object B pass object A?
c. How fast is object A moving?
d. How far did object B move in the
first 7 seconds of it’s motion?
8. What is the difference between velocity and acceleration? (check notes)
9. What are the units for distance? For time? For velocity (speed)? For acceleration?
10. A chimpanzee throws a banana straight up in the air. What is the velocity of the banana at it’s maximum height? What is the acceleration of the banana on the way up? At the top? On the way down?
11. Refer to the velocity vs. time graph below in which an object moved along a linear path (straight line).
a. Describe the motion of the object during the 8 s trip.
b. When was the acceleration of the object equal to zero?
c. What is the speed of the object at 2 seconds?
d. What is the acceleration of the object in the first 4 seconds?
e. Describe and sketch the particle/motion diagram for the first
4s of the trip. Do a separate particle diagram for the last 4 s
of the trip.
7. a. A: straight line indicates that the object is moving at constant speed.
B: curved line indicates that the object is accelerating (speeding up).
b. At t = 9.5 sec (at position 50 m)
c. Find slope of the line: v = 3.1 m/s
d . 20 m
11. a. in the first 4 s, the object is speeding up. From time 4s to 8 seconds it is moving at constant velocity of 60 m/s.
b. from 4 s to 8 seconds
c. (look at the graph) 30 m/s
d. (use the graph to determine vi, vf and time) 15 m/s2
e. first motion diagram should show an increase in dot spacing, second motion diagram: the dots are evenly spaced.
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A
B
Velocity
(m/s)
C
60
40
20
0
0 1 2 3 4 5 6 7 8
Time (s)
A
B
60
40
20
0
0 4 8 12 16
Time(s)
Position
(m)
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