Which of the following most accurately describes the block-track system? Choose 1 answer: A B D The system is open because there is an external force performing work on it. The system is open because the change in kinetic energy of the system is 0. The system is closed because there is a net force acting on the system. The system is closed because the change in kinetic energy of the system is 0.
Which of the following most accurately describes the block-track system? Choose 1 answer: A B D The system is open because there is an external force performing work on it. The system is open because the change in kinetic energy of the system is 0. The system is closed because there is a net force acting on the system. The system is closed because the change in kinetic energy of the system is 0.
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Author:Raymond A. Serway, Chris Vuille
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Transcribed Image Text:Which of the following most accurately
describes the block-track system?
Choose 1 answer:
A
B
C
D
The system is open because there is an external
force performing work on it.
The system is open because the change in
kinetic energy of the system is 0.
The system is closed because there is a net force
acting on the system.
The system is closed because the change in
kinetic energy of the system is 0.
Transcribed Image Text:Work and mechanical energy
A block is released from rest at point A at the top
of a frictionless inclined track, as shown below.
From point B through point C, the track is
horizontal, and the surface has a coefficient of
friction of µ. The mass comes to rest before it
reaches point C.
Consider the system of the block and the track
surface from points A through C.
A
B
Which of the following most accurately
describes the block-track system?
с
Expert Solution
Step 1
Solution: The potential of the system at A converts to kinetic energy of the system when block reaches point B. Therefore, there is no change in the kinetic energy of the system.
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