Total ~Energy = 1 2 m v 2 + 1 2 k x 2 = 1 2 k x f 2 = constant . From the energy conservation, we can estimate that, by the time the block reaches x=0 position, its speed will be v(x=0)=√kmxf v ( x = 0 ) = k m x f .

Also, What is the formula to calculate work done?

FAQs on Formula for Work

Mathematically, the concept of work done W equals the force f times the distance (d), that is W = f. d and if the force is exerted at an angle θ to the displacement, then work done is calculated as W = f .

Hereof, How do you calculate total energy used?

As every engineer knows, energy calculation is straightforward. The unit of electrical energy is the kilowatt-hour (kWh), found by multiplying the power use (in kilowatts, kW) by the number of hours during which the power is consumed. Multiply that value by the cost per kWh, and you have the total energy cost.

Also to know How do I calculate power? Power is equal to work divided by time. In this example, P = 9000 J /60 s = 150 W .

What is current formula?

The relationship between current and resistance in an electric circuit. Current is usually denoted by the symbol I. Ohm’s law relates the current flowing through a conductor to the voltage V and resistance R; that is, V = IR. An alternative statement of Ohm’s law is I = V/R.

20 Related Questions Answers Found

What is the efficiency formula?

Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.

What is the formula to calculate kWh?

Here’s the Formula for Calculating Watts Into Kilowatt-Hours: kWh = (watts × hrs) ÷ 1,000.

How do we calculate efficiency?

The work efficiency formula is efficiency = output / input, and you can multiply the result by 100 to get work efficiency as a percentage.

What is power write its formula?

P = W / t. The standard metric unit of power is the Watt. As is implied by the equation for power, a unit of power is equivalent to a unit of work divided by a unit of time. Thus, a Watt is equivalent to a Joule/second.

What is voltage drop formula?

Voltage drop of the circuit conductors can be determined by multiplying the current of the circuit by the total resistance of the circuit conductors: VD = I x R.

How do you calculate current bill?

1 Unit = 1kWh. So the Total kWh = 1000 Watts x 24 Hrs x 30 Days = 720000 … Watts / hour. We want to convert it into electric units, Where 1 Unit = 1kWh.

Power Consumption of Typical Home Appliances in Watts.

Electrical Appliance Power Wattage in Watts “W”
Clothes Iron 1400
Dishwasher 1300
Electric Kettle 1700

What is the formula for resistance in physics?

Resistance has units of ohms (Ω), related to volts and amperes by 1 Ω = 1 V/A. There is a voltage or IR drop across a resistor, caused by the current flowing through it, given by V = IR.

What are examples of efficiency?

Efficiency is defined as the ability to produce something with a minimum amount of effort. An example of efficiency is a reduction in the number of workers needed to make a car. The ratio of the effective or useful output to the total input in any system. Efficiency apartment.

How do you measure work efficiency?

Measuring Efficiency

Divide the standard labor hours by the actual amount of time worked and multiply by 100. The closer the final number is to 100, the more effective your employees are. For example, let’s say the standard labor hours for a certain project is 80 and the actual amount of time worked is 92.

What are the efficiency ratio?

An efficiency ratio measures a company’s ability to use its assets to generate income. … Some common efficiency ratios are accounts receivable turnover, fixed asset turnover, sales to inventory, sales to net working capital, accounts payable to sales and stock turnover ratio.

How do I calculate my monthly kWh usage?

100 watts x 4 hours = 400 watt‐hours = .

Add them together, and you’ll have your total daily kWh usage. Then multiply that daily usage number by the number of days in the month to calculate your monthly usage.

How do you calculate monthly kWh?

To calculate your kWH per month or per year, just multiply by the number of days in that period. Example: Over the course of a 30-day month, your fan would use (1.25 kWh / day) x (30 days / month) = 37.5 kWh per month.

How do I calculate unit?

So a 100-Watt bulb if kept on for 10 hours will consume: 100 x 10 = 1000 Watt-Hour = 1 Kilowatt-Hour (kWH) = 1 units (on your meter).

What is efficiency and how is it calculated?

The efficiency formula is: (Work output ÷ Work input) x 100% = Efficiency. The work output in this definition is considered to be the useful amount of work output – that is, all scrap, spoilage, and waste is excluded from the numerator.

What is power example?

Power is defined as the ability to act or have influence over others. An example of power is the strength needed to run five miles. An example of power is the authority a local government has to collect taxes. … The definition of power is operating electrically or having strength or force.

Is power equal to force times velocity?

Calculating Power

Since work is force times displacement (W=F*d), and velocity is displacement over time (v=d/t), power equals force times velocity: P = F*v. More power is seen when the system is both strong in force and fast in velocity.

How do I calculate wire size?

Wire Sizing Chart and Formula

  1. Calculate the Voltage Drop Index (VDI) using the following formula:
  3. Determine the appropriate wire size from the chart below.

What is the current formula?

The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as I = V/R. The SI unit of current is Ampere (Amp).

What size wire do I need to run 300 feet?

At 300 feet I would suggest going with the aluminum. The #2 should work just fine. With a full load of 60 amps, the voltage drop is the same as the #4 copper Ray quoted.