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Motion
Test Description: Chapter 1 Test
Instructions: Answer all questions to get your test result.
1) Speed measurements are given in units of
A
distance/time
B
time^2/ distance
C
time/distance
D
distance/time^2
2) Measurements of acceleration are given in units of
A
time^2/distance
B
distance/time^2
C
time/distance
D
distance/time
3) An airplane that moves 50 meters in one second has a speed of
A
500 cm/s
B
180000 m/h
C
5000 m/hr
D
1800 km/h
4) How many centimeters are in a kilometer?
A
100
B
100000
C
1000
D
1000000
5) A car traveling at 25 m/s speeds up to 40 m/s over a period of 15 seconds. The average acceleration of the car is
A
1 m/s^2
B
15 km/s^2
C
cannot be calculated from the information given
D
15 m/s^2
6) A rider finishes a 120 km bicycle trip in 3 hours. The average speed of the rider is
A
4 m/s^2
B
360 km/hr
C
3.6 m/s
D
40 km/hr
7) The trunk of a certain tree is 50 cm thick. Each year it gets thicker by 1 cm. How thick will the trunk be in 50 years?
A
50 cm
B
5000 cm
C
2500 cm
D
100 cm
8) In can be important to know the velocity of an object, not just its speed, because
A
speed is always an average.
B
velocity also tells acceleration.
C
speed is only useful for fast moving objects.
D
velocity also tells direction.
9) A runner starts a 5 km race at 10:15 a.m. and finishes at 10:35 a.m. Given this information, you can calculate the runner's
A
average speed.
B
velocity.
C
reference point.
D
acceleration.
10) An airplane flies 80 km in 10 minutes and then flies 100 km in 20 minutes. The average speed of the airplane is
A
360 km/h
B
none of the above
C
60 km/h
D
8 km/h
11) An object is in motion if it is moving relative to a(n)
A
reference point
B
direction
C
speed
D
moving object
12) To calculate acceleration, divide the change in ___________ by the time during which the acceleration occurs.
A
velocity
B
speed
C
direction
D
slope
13) The velocity of an object gives both its speed and __________.
A
movement
B
acceleration
C
direction
D
time
14) You can calculate an average ________ if you know both the total distance and the total time of a trip.
A
acceleration
B
velocity
C
distance
D
speed
15) An object cannot be accelerating if it has a constant speed.
A
True
B
False
16) The information needed for describing velocity is distance/time and direction.
A
True
B
False
17) To determine the speed of an object, divide distance by acceleration.
A
False
B
True
18) An object is in motion only if its distance from a reference point is stationary.
A
False
B
True
19) If you know the speed of an object, you also know the direction of movement.
A
False
B
True
*select an answer for all questions
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