909728
Question 1
Question
A particle of mass 1 kg is located at (0,0) and a particle of mass 2 kg is located at (3,0). What is the location of the center of mass of this system?
Answer
-
(0,0)
-
(1,0)
-
(1.5,0)
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(2,0)
Question 2
Question
The net external force on a system of particles is zero. What is the velocity of the center of mass of the system?
Answer
-
0
-
Constant
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Constantly increasing
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Constantly decreasing
Question 3
Question
The net external force on a system of particles is zero. What is the velocity of each particle in the system?
Answer
-
0
-
Constant
-
Constantly increasing
-
Not enough information
Question 4
Question
Four particles of equal mass are at points (0,0), (2,0), (2,2) and (0,2). Where is the center of mass of the system?
Answer
-
(1,0)
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(1,1)
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(2,0)
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(2,2)
Question 5
Question
Where is the center of mass of a single particle?
Answer
-
The point halfway between the particle and the origin
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The origin
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The position of the particle
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Undefined
Question 6
Question
A net force of 8 N is applied to a system containing four masses, each of 1kg. What is the resultant acceleration of the center of mass of the system?
Answer
-
2 m/s
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8 m/s
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12 m/s
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32 m/s
Question 7
Question
What is the definition of impulse?
Answer
-
Force per unit time
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Force per unit distance
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Force over a distance
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Force over a time
Question 8
Question
A bat exerts a force on a ball of 100 N for a period of .1 seconds. What is the impulse provided by the bat?
Answer
-
100
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10
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1
-
1000
Question 9
Question
A net impulse on an object causes
Answer
-
A change in its kinetic energy
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A change in its speed
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A change in its momentum
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A change in its mass
Question 10
Question
A ball of mass 2 kg bounces against a wall with a velocity of 6 m/s and rebounds with the same velocity. What is the impulse provided by the wall?
Answer
-
12
-
24
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3
-
8
Question 11
Question
What are the units of impulse, in terms of fundamental units?
Answer
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N-s
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kg-m/s
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J/s
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kg-m
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