How is power calculated according to the physics definition?

How is power calculated according to the physics definition?

• A. P = \frac{W}{m}
• B. P = W \times t
• C. P = \frac{W}{t}
• D. P = W + t

Answer: (C)

Power is defined in physics as the rate at which work is done or energy is transferred over time. The correct relationship is expressed by the formula: \[ P = \frac{W}{t} \] In this formula, \( P \) represents power, \( W \) is the work done (or energy transferred), and \( t \) is the time taken to perform that work. This relationship shows that power measures how much work is done per unit of time; thus, it quantifies the speed of energy transfer or work completion. When considering the other choices, they do not accurately reflect the definition of power. For instance, \( P = \frac{W}{m} \) involves dividing work by mass, which does not relate to the concept of power since it doesn't involve a time component. The equation \( P = W \times t \) incorrectly implies that power is some product of work and time, which does not correspond to the correct definition since power is the ratio of work to time, not their multiplication. Lastly, \( P = W + t \) suggests an addition of work and time, which is not physically meaningful in the context of power calculations. Each of these alternatives misrepresents the relationship between work

Power is defined in physics as the rate at which work is done or energy is transferred over time. The correct relationship is expressed by the formula:

[ P = \frac{W}{t} ]

In this formula, ( P ) represents power, ( W ) is the work done (or energy transferred), and ( t ) is the time taken to perform that work. This relationship shows that power measures how much work is done per unit of time; thus, it quantifies the speed of energy transfer or work completion.

When considering the other choices, they do not accurately reflect the definition of power. For instance, ( P = \frac{W}{m} ) involves dividing work by mass, which does not relate to the concept of power since it doesn't involve a time component. The equation ( P = W \times t ) incorrectly implies that power is some product of work and time, which does not correspond to the correct definition since power is the ratio of work to time, not their multiplication. Lastly, ( P = W + t ) suggests an addition of work and time, which is not physically meaningful in the context of power calculations. Each of these alternatives misrepresents the relationship between work