909728
Pregunta 1
Pregunta
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?
Respuesta
-
(0,0)
-
(1,0)
-
(1.5,0)
-
(2,0)
Pregunta 2
Pregunta
The net external force on a system of particles is zero. What is the velocity of the center of mass of the system?
Respuesta
-
0
-
Constant
-
Constantly increasing
-
Constantly decreasing
Pregunta 3
Pregunta
The net external force on a system of particles is zero. What is the velocity of each particle in the system?
Respuesta
-
0
-
Constant
-
Constantly increasing
-
Not enough information
Pregunta 4
Pregunta
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?
Respuesta
-
(1,0)
-
(1,1)
-
(2,0)
-
(2,2)
Pregunta 5
Pregunta
Where is the center of mass of a single particle?
Respuesta
-
The point halfway between the particle and the origin
-
The origin
-
The position of the particle
-
Undefined
Pregunta 6
Pregunta
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?
Respuesta
-
2 m/s
-
8 m/s
-
12 m/s
-
32 m/s
Pregunta 7
Pregunta
What is the definition of impulse?
Respuesta
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Force per unit time
-
Force per unit distance
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Force over a distance
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Force over a time
Pregunta 8
Pregunta
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?
Respuesta
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100
-
10
-
1
-
1000
Pregunta 9
Pregunta
A net impulse on an object causes
Respuesta
-
A change in its kinetic energy
-
A change in its speed
-
A change in its momentum
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A change in its mass
Pregunta 10
Pregunta
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?
Respuesta
-
12
-
24
-
3
-
8
Pregunta 11
Pregunta
What are the units of impulse, in terms of fundamental units?
Respuesta
-
N-s
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kg-m/s
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J/s
-
kg-m
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