- Why is work done?
- What is energy and its formula?
- Is voltage a field?
- How do you calculate work done over time?
- What is the formula of work done in electricity?
- What is the standard unit of work?
- What is a power?
- What is the formula of work done?
- What is the formula of distance?
- What is Ke formula?
- What is the work done by time?
- What is work done equal to?
- Is Ke equal to GPE?
- What is PE and Ke?
- How do you calculate work done by weight?
- What is the unit of power?
- How can energy be consumed when no work is done?

## Why is work done?

The Angle between the Force Vector and the Displacement Vector.

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For an object moving in the opposite direction to the direction of force, such as friction acting on an object moving in the forward direction, the work is done due to the force of friction is negative..

## What is energy and its formula?

For the potential energy the formula is. P.E. = mgh. Unit. The SI unit of energy is joules (J), which is named in honour of James Prescott Joule.

## Is voltage a field?

The Simple Math Behind “Voltage” To be a bit more specific, Voltage is a way of using numbers to describe an electric field. Electric fields or “E-fields” are measured in volts over a distance; volts per centimeter for example.

## How do you calculate work done over time?

Power is equal to work divided by time. In this example, P = 9000 J /60 s = 150 W . You can also use our power calculator to find work – simply insert the values of power and time.

## What is the formula of work done in electricity?

So if 1 watt = 1 joule per second, it therefore follows that: 1 Joule of energy = 1 watt over one unit of time, that is: Work equals Power multiplied by Time, (V*I*t joules). So electrical energy (the work done) is obtained by multiplying power by the time in seconds that the charge (in the form of a current) flows.

## What is the standard unit of work?

In the case of work (and also energy), the standard metric unit is the Joule (abbreviated J). One Joule is equivalent to one Newton of force causing a displacement of one meter. In other words, The Joule is the unit of work.

## What is a power?

In physics, power is the amount of energy transferred or converted per unit time. In the International System of Units, the unit of power is the watt, equal to one joule per second. In older works, power is sometimes called activity. Power is a scalar quantity.

## What is the formula of work done?

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 of distance?

Learn how to find the distance between two points by using the distance formula, which is an application of the Pythagorean theorem. We can rewrite the Pythagorean theorem as d=√((x_2-x_1)²+(y_2-y_1)²) to find the distance between any two points. Created by Sal Khan and CK-12 Foundation.

## What is Ke formula?

Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

## What is the work done by time?

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).

## What is work done equal to?

In other words, the work done is equal to the change in energy. For example, the work done against gravity is equal to the change in the potential energy of the body and the work done against all resistive forces is equal to the change in the total energy.

## Is Ke equal to GPE?

At terminal velocity, the rate of energy transfer for those two processes (GPE ==> KE, and KE ==> air) are equal; GPE is transforming into KE, and KE is transforming into energy of the air at the same rate, which is why speed stops increasing.

## What is PE and Ke?

Energy is the ability to do work. Potential Energy (PE) is stored energy due to position or state. PE due to gravity = m g h. Kinetic Energy (KE) is energy of motion.

## How do you calculate work done by weight?

Work = Mass * Gravity * Height and is measured in Joules. Imagine you find a 2 -Kg book on the floor and lift it 0.75 meters and put it on a table. Remember, that “force” is simply a push or a pull. If you lift 100 kg of mass 1-meter, you will have done 980 Joules of work.

## What is the unit of power?

WattPower/SI units

## How can energy be consumed when no work is done?

This energy comes from the chemical energy in your body and most of them are converted into heat and lost to the surrounding. In this situation, no energy is transferred to the book, so no work is done. You can feel the different energy consumption when your arm is stretched in different angle.