work done vs power

K E 1 2 m v 2. You must have energy to accomplish work - it is like the currency for performing work.

Work And Power Physics Notes Work Energy And Power Power Physics

As a man of great power.

. The SI unit of work is Joule J. Work and Energy. Work is the amount of force required to move an object by applying outside force while power is the degree at which work is done.

Power describes the rate of energy conversion. And the object with energy can exert force on another object to transfer energy. Work is measured in joules whereas power is measured in watts.

The faculty of doing or performing something. W work Joules θ angle. But the fundamental definition of power is the latter namely energy per time.

There are various forms of energy. Conservation of energy links GPE KE and work done. Power is the work done per unit of time.

W F θ r T θ 2 where. An object can have a value for the power without doing any work. Thus the work done capacity measures the energy.

But for work to be done energy is the most important thing as it is the ability to work. Work can also be measured in units like electron volt eV kWh MWh and GWh. When we drop the rock the force of gravity causes the rock to fall giving the rock kinetic energy.

Work done by expanding gas Pressure Pa x Change in volume m 3 Simplified formula. The work we do on the rock also equals the rocks gain in gravitational potential energy PEe. Lesson 2 - The Work-Energy Relationship.

R radius m T torque or moment Nm Power transmitted. Capacity for action or performance. If you do 100 joules of work in one second using 100 joules of energy the power is 100 watts.

Power is an essential measurement because the rate at which you can convert one form of energy to another is just as important. The work done can be expressed as. Power worktime Work force x distance Velocity distancetime Therefore power force x velocity Snatchs are power exercises lifting weights fast velocity is the speed in which you lift the weight.

W P E e m g d. Work is a scalar quantity. Conversely power is indicated by formula P Wt.

Lesson 1 - Basic Terminology and Concepts. Work Force Displacement. Ability to act regarded as latent or inherent.

Energy is a systems ability to do work. In other words it is the work done per unit time. Triangle U_InternalEnergyQ_heatpm W_work Power.

Power is a scalar quantity. Power is the work done per unit of time. The equation to calculate power is.

Power is the rate of transfer of energy or the rate of doing work. The equation to calculate power is. In the case of work done object working loses energy while work done on an object gains energy.

If the object does any work the value of the power cannot be zero. The equation to calculate work is. The SI unit of power is Watt W.

Work represents the amount of energy transferred when doing something. When an object moves towards the direction of the force applied then work is said to be done. Power represents how fast the energy was transferred.

The work is denoted by the formula W FS. Joule J is the SI unit of work whereas Watt W is the SI unit of power. Well power is defined as the amount of work done per second and it is measured in watts or joules per second.

W work done J Nm F force N s distance moved by force s For an angular motion. Definition and Mathematics of Work. Kinetic energy depends on the mass of an object and its velocity v.

Both seem to be correct as another answer also points out. Work done is the same as energy transferred. Meaning both formulas can be used to calculate power.

They are equal in magnitude but one or the other is typically shown as negative depending on the system and if work was done by the system or done on the system. Answer 1 of 3. Power is the ratio between the work done and the time taken and can be expressed as.

Work is the amount of force required to move an object by applying outside force while power is the degree at which work is done. Is the rate of doing work or the rate of using energy which are numerically the same. Studying work energy power is important in terms of both acquiring knowledge and getting higher marks in the exam.

Calculating the Amount of Work Done by Forces. The SI unit of energy is joule or J which is the same as work done. Capability of producing an effect whether physical or moral.

To do 100 joules of work you must expend 100 joules of energy. In this general definition power can be calculated for mechanical systems thermodynamic systems electric system etc.

This Is The Study Guide I Use With My Students As They Prepare For Their Unit Test The Vocabulary Includ Work Energy And Power Teaching Energy Physics Lessons

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