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The rate of doing work is?
power
How does power vary with the time spent in doing work?
Power decreases as the time spent doing the work increases. This is according to the formula of where power equals the work done divided by the time doing it. Power and time therefore stand in an inverse mathematical relationship.
What does the term power mean?
Power is the rate of doing work
How much work is done in 1 minute by a machine operating at 300 ft. lb-sec?
To calculate the work done in one minute by a machine operating at 300 ft-lb/sec, we multiply the power by the time. Since there are 60 seconds in a minute, the work done is 300 ft-lb/sec × 60 sec = 18,000 ft-lb. Therefore, the machine does 18,000 foot-pounds of work in one minute.
How much power is needed to do 1200 Joules of work in 90 seconds?
Power is measured in watts, or joules per second. So in 90 seconds, 1200 joules of work is equal to 1200/90 watts or 13.3 watts.
What is the power of a machine that does 1500 joules of work in 30 seconds?
The power of the machine is 50 watts. Power is calculated by dividing the work done (1500 joules) by the time taken to do the work (30 seconds).
What power is used by a machine to perform 800 joules of work in 25 seconds?
Power = energy/time During those 25 seconds, the machine is doing work at the rate of 800/25 = 32 watts. We don't know how much power the machine must consume in order to perform work at that rate, but we know it's more than 32 watts.
The power of a machine measuer what its rate of doing work the force it produces its strength the work it does?
"Power" is the rate of work, or of energy transfer.
How long would it take a machie to do 5000 joules of work if the power rating of the machine is 100 watts?
To calculate the time taken to do 5000 joules of work with a 100-watt machine, you can use the formula: time (seconds) = work (joules) / power (watts). Therefore, the time taken would be 5000 joules / 100 watts, which equals 50 seconds for the machine to complete the work.
Which is measured by the power of a machine?
The power of a machine is typically measured by the rate at which it can perform work, which is the amount of energy transferred or converted per unit of time. In most cases, this power is expressed in watts or horsepower.
What is the work done by a machine on a machine?
Power
What is the power rating of a machine if it took 5 seconds to lift a 50kg crate 10 meters?
The power rating of the machine can be calculated using the formula: Power = Work / Time. The work done is equal to the force applied (50kg * 9.8 m/s^2) multiplied by the distance (10 meters). Therefore, the power rating can be calculated as (50kg * 9.8 m/s^2 * 10m) / 5 seconds.
Where does the input power go when the mechanical output power is zero?
either to friction (heat, sound, light) or to internal mechanical changesAnother AnswerPower doesn't 'go' anywhere! Power is simply a 'rate': the rate at which the machine is doing work. If the machine isn't doing work by supplying a mechanical load, then it's output power is zero. However, energy still has to be provided to overcome the losses due to heat transfer from the machine, friction, windage, etc. The rate at which this energy is supplied to the motor is the power of the machine off load.
If it took 5 seconds to lift the crate using a machine what was the power rating of the machine?
We have no way of knowing what power the machine was rated for, but with the information given in the question, we can calculate the power it delivered during the crate-lift: It was (1.96) x (mass of the crate in kilograms) x (distance the crate was lifted in meters) watts.
What are the uses of a simple machine?
Doing work.
What is the power of a machine that lifts a N object 4 in 6 seconds?
The power of the machine can be calculated using the formula Power = Work/Time. Given that Work = Force x Distance, and the force required to lift the object will be its weight (N), the power can be calculated using the force (weight of object) and the distance it is lifted in the given time frame.
How much power is necessary to do 60 joules of work in 20 seconds?
The power required to do 60 joules of work in 20 seconds is determined by the formula: Power = Work / Time. Therefore, Power = 60 joules / 20 seconds = 3 watts. So, 3 watts of power is necessary to do 60 joules of work in 20 seconds.
