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siniylev [52]
3 years ago
13

"the velocity of the block is constant, so the net force acting on the block must be zero. Thus the normal force equals the weig

ht and the force of friction equals the applied force" what, if anything, is wrong with this statement
Physics
1 answer:
RSB [31]3 years ago
6 0

Answer:

Explanation:

"the velocity of the block is constant, so the net force acting on the block must be zero. Thus the normal force equals the weight and the force of friction equals the applied force" The only thing which is wrongly stated here is that the normal force equals the weight. Normal force is not always equal to weight. If external force is applied at some angle with the horizon , normal force may be more or less than weight. Even in case of an object placed on an  inclined plane , weight is not equal to normal force .

All other parts of the statement are correct.

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If the temperature of water warming on a hot plate rises 10 degrees Celsius [°C], what is the change in temperature in units of
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A heat engine accepts 200,000 Btu of heat from a source at 1500 R and rejects 100,000 Btu of heat to a sink at 600 R. Calculate
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To solve the problem it is necessary to apply the concepts related to the conservation of energy through the heat transferred and the work done, as well as through the calculation of entropy due to heat and temperatra.

By definition we know that the change in entropy is given by

\Delta S = \frac{Q}{T}

Where,

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T = Temperature

On the other hand we know that by conserving energy the work done in a system is equal to the change in heat transferred, that is

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According to the data given we have to,

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PART B)

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W = 100000 Btu

Therefore the work in the system is 100000Btu

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