How Do You Find Power Using Work And Time?

What is the relation between work and time?

Relations between work, time and person: – Work & Person: Directly proportional i.e.

more work, more person required.

Time & Person: Inversely proportional i.e.

more people, less time required.

Work & time: Directly proportional i.e.

more work, more time required..

How many watts do I use a day?

The average U.S. home uses about 900 kWh per month. So that’s 30 kWh per day or 1.25 kWh per hour. Your average daily energy usage is your target daily average for to calculate your solar needs.

How much power does a 60 watt bulb use in an hour?

So, a 60-watt bulb uses 60 watts hours or . 06 kilowatt hours of energy for each hour it’s on. The bulb would use 1 kilowatt hour in just less than 17 hours if left on continuously; around 12 cents in our current tariff for most residential customers.

How do you calculate watts per hour?

How to calculate my energy consumptionDevice Wattage (watts) x Hours Used Per Day = Watt-hours (Wh) per Day.Device Usage (Wh) / 1000 (Wh/kWh) = Device Usage in kWh.Daily Usage (kWh) x 30 (Days) = Approximate Monthly Usage (kWh/Month)

How do you find power?

Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in a unit called the horsepower.

What is the formula for time and work?

Important Time and Work Formula Work Done = Time Taken × Rate of Work. Rate of Work = 1 / Time Taken. Time Taken = 1 / Rate of Work. If a piece of work is done in x number of days, then the work done in one day = 1/x.

What is the formula of work?

Work is done when a force that is applied to an object moves that object. The work is calculated by multiplying the force by the amount of movement of an object (W = F * d). A force of 10 newtons, that moves an object 3 meters, does 30 n-m of work.

What is the formula for kW?

Basic electrical theory tells us that for a single-phase system, kW = (V × I × PF) ÷ 1,000. kW = (V × I) ÷ 1,000.

What is the 5 rule in physics?

The 5% rule is a way of determining if the y-intercept is significant to the equation or negligible due to calculation errors. Negligible means it is insignificant or you can neglect it because it is of a small enough value. In order to determine how small is small enough to call it zero, we use the 5% rule.

What is the formula of power?

Power Formula 2 – Mechanical power equation: Power P = E ⁄ t where power P is in watts, Power P = work / time (W ⁄ t). Energy E is in joules, and time t is in seconds.

How do you find minimum power?

Use the formula for power: Power = Voltage x Current, or P = VI. If you are trying to calculate the minimum load and you happen to only know the power and voltage ratings of your power supply, you can use the formula P = V2/R, which can become R = V2/P.

What is the formula of time in power?

The formula that links energy and power is: Energy = Power x Time. The unit of energy is the joule, the unit of power is the watt, and the unit of time is the second.

How do you calculate work time?

To calculate time to complete a work in general if a person A completes 1/n th part of work in one day, then the time taken by A to complete the work = n days. If a man takes 10 days to complete a piece of work; then according to the unitary method work done in a 1 day = 1/10.

What is the difference between work and power?

Work is defined as the process of energy transfer to the motion of an object through the application of force. Power is defined as the amount of energy transferred in unit time. … The SI unit of power is the watt.