909728
Questão 1
Questão
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?
Responda
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(0,0)
-
(1,0)
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(1.5,0)
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(2,0)
Questão 2
Questão
The net external force on a system of particles is zero. What is the velocity of the center of mass of the system?
Responda
-
0
-
Constant
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Constantly increasing
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Constantly decreasing
Questão 3
Questão
The net external force on a system of particles is zero. What is the velocity of each particle in the system?
Responda
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0
-
Constant
-
Constantly increasing
-
Not enough information
Questão 4
Questão
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?
Responda
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(1,0)
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(1,1)
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(2,0)
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(2,2)
Questão 5
Questão
Where is the center of mass of a single particle?
Responda
-
The point halfway between the particle and the origin
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The origin
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The position of the particle
-
Undefined
Questão 6
Questão
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?
Responda
-
2 m/s
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8 m/s
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12 m/s
-
32 m/s
Questão 7
Questão
What is the definition of impulse?
Responda
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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
Questão 8
Questão
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?
Responda
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100
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10
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1
-
1000
Questão 9
Questão
A net impulse on an object causes
Responda
-
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
Questão 10
Questão
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?
Responda
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12
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24
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3
-
8
Questão 11
Questão
What are the units of impulse, in terms of fundamental units?
Responda
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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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