.47 watt
To lift a 950-N load 3 meters requires (950 x 3) = 2,850 joules of energy.The power is the rate at which the energy is delivered. It takes more powerto lift the load faster.The power used to lift this load is (2,850 joules) divided by (the number of seconds it takes),and the unit of the answer is watts.
Some seconds (1 minute/60 seconds)
Although most of the time power is measured in Watts, it can also be expressed as Js-1. So in your question, you are given the amount of joules and the time in hours. First, convert 5 hours to seconds. There are 60 mins in an hour and 60 seconds in a minute. So that's going to be 5x60x60 = 18000 seconds Now all you do in divide the number of joules by the number of seconds to work out the power. So that's 7500/18000 = 0.41666666666... approximately, 0.42Js-1(2dp) and thats the same as 0.42W (2dp)
Use the definition of power as energy / time. Or work / time; it's basically the same thing.
do not hnow
Power is calculated by dividing the work done in Joules by the time taken in seconds. So, if x Joules of work are done in 10 seconds, the power used would be x/10 watts.
We would need more information to determine the power used. Power is calculated by the formula: Power = Work / Time. If you provide the amount of work done within the 2 seconds, then we can calculate the power used.
The power used would be 60 watts. This can be calculated by dividing the work done (600 joules) by the time taken (10 seconds).
The power used to move the box would be 250 Watts. This is calculated by dividing the energy (2000 Joules) by the time taken (8 seconds).
.47 watt
The power required to do 40 J of work in 5 seconds is 8 watts. This can be calculated by dividing the work (40 J) by the time (5 seconds). The formula for power is Power = Work / Time.
The power used would be 60 watts. This can be calculated by dividing the work done (600 J) by the time taken (10 seconds), resulting in 60 watts.
3000
The work done can be calculated using the formula: work = power × time. Substituting the given values, the work done would be 478 Watts × 14 seconds = 6692 Joules.
Power is the rate at which work is done, given by the formula Power = Work/Time. In this case, Power = 120 Joules / 60 seconds = 2 Watts.
Power is calculated as the amount of work done divided by the time taken to do that work. In this case, the power used would be 600 Joules of work done in 10 seconds, which equals 60 Watts.