Which of the following statements about work done and power is correct?*1 pointA . Power is the energy transferred, while work done is the rate of doing work.B . Work done is the energy transferred, while power is the rate of doing work.C . Work done and power are synonymous terms.D . Work done and power are unrelated concepts.
Question
Which of the following statements about work done and power is correct?*1 pointA . Power is the energy transferred, while work done is the rate of doing work.B . Work done is the energy transferred, while power is the rate of doing work.C . Work done and power are synonymous terms.D . Work done and power are unrelated concepts.
Solution
The correct statement is B. Work done is the energy transferred, while power is the rate of doing work.
Here's why:
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Work done: In physics, work is defined as the amount of energy transferred by a force acting through a distance. It is calculated as the product of the force and the distance over which it is applied. If a force of F newtons is applied over a distance of d meters, the work done (W) is given by the equation W = F * d.
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Power: Power, on the other hand, is the rate at which work is done or energy is transferred. It is calculated as the work done per unit time. If a work of W joules is done in a time of t seconds, the power (P) is given by the equation P = W / t.
So, statement B is correct because it accurately describes the concepts of work and power in physics.
Similar Questions
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What is power and how is it calculated?a.Power is the amount of energy expended, and it is calculated as energy (e.g., kcal) divided by time.b.Power is the total amount of force generated, and it is calculated as force divided by time.c.Power is the ability to lift heavy weights, and it is determined by the 1-RM.d.Power is the rate of work, and it is calculated as work divided by time.Clear my choice
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Power = 400 WTime = 2.5 minutesCalculate the work done.Work done = _____ kJ
Which of the following statements does NOT explain the meaning of the term ‘power’ in physics?The amount of energy transferred per secondThe rate at which energy is transferredThe rate at which work is doneThe total amount of energy which something has2An LED light bulb has a power rating of 6 W. What does this mean?The bulb will use six ‘units of electricity’ per hourThe bulb must be connected to a 6 V power supplySix joules of energy are transferred to the bulb every secondThe bulb will only light once six joules of energy have been transferred to it3An athlete runs up a flight of stairs in 10 seconds and 16 kJ of energy is transferred to their gravitational potential store. Calculate their power output. You may neglect all other energy transfers in answering this question.1.6 W160 W160,000 W1600 W4The output of a mobile phone charger is labelled ‘5 V, 1 A, 5 W’. How much electrical energy will be supplied by the charger when it runs steadily for ten minutes?50 J3 kJ250 J15 kJ5A car of mass 2000 kg accelerates from rest to 20 m/s in 10 seconds. Calculate the average power output of its engine. In answering this question, you may assume that all of the energy which is supplied by the car’s engine is transferred to its kinetic store.4,000 W40,000 W4,000,000 W400,000 W6During a television programme, 180 kJ of energy was transferred to a 100 W television. How long was the programme?18 seconds1,800 seconds18,000 seconds546 seconds
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