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tekilochka [14]
3 years ago
11

In a practical machine, the power output is smaller than the power input. Considering the law of energy conservation, what can e

xplain this occurrence?
A. Some of the energy is used to combat friction, and thus is transformed from mechanical energy to heat.

B. Some of the energy going into the machine is being created at a quicker rate than the energy coming out is being destroyed.

C. Some of the energy coming out of the machine is being destroyed.

D. Some of the energy going into the machine is being destroyed
Physics
2 answers:
TEA [102]3 years ago
7 0

PF STUDENTS:  Some of the energy is used to combat friction, and thus is transformed from mechanical energy to heat.

Grace [21]3 years ago
5 0

The law of energy conservation states that energy cannot be created or destroyed, so choices B to D are immediately invalid. Choice A can explain this occurrence: <u>A. Some of the energy is used to combat friction, and thus is transformed from mechanical energy to heat.</u>

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Answer:

7kgm/s

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Using the law of conservation of momentum which states that the sum of momentum of bodies before collision is equal to the sum of the bodies after collision.

Let P1A and P1B be the initial momentum of the bodies A and B respectively

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Based on the law:

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3 years ago
When the position of the mass is farthest from the equilibrium position, what is the velocity of the mass?
Llana [10]
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Explanation:

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