work vs power example

Work is the ability to supply force and a change in distance to an object. The SI Unit of work is Joules J.

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Example 25 N force is applied to a box and box moves 10m.

. An object can have a value for the power without doing any work. Displacement dr 15 m. Work represents the amount of energy transferred when doing something.

Now let us look at the formulas that differentiate work from power. Work is measured in joules whereas power is measured in watts. Example 1 - Calculating Work and Power A person pushes a cardboard moving box full of clothes which has a mass of 25 kilograms across the floor with 350.

W 125 60 J. Below is a table of differences between Work and Energy. The SI unit of work is Joule J.

Work is the displacement of an object when a force push or pull is applied to it. Work done W Fdr cos θ. Power is a scalar quantity.

F is measured in newtons N. Work is the distance traveled by the object in the direction of the force applied whereas the energy acts as the force and it refers the ability of the object to produce or create work. Work is a scalar quantity.

W is measured in joules J. The rate of doing work is equal to the rate of using energy since the force transfers one unit of energy when it does one unit of work. For example a person pressing against a brick wall is consuming energy but no work is being done and no power created because the wall does not move.

Total Work Done W Power P x Time t Or. Power is the work done per unit of time. Power represents how fast the energy was transferred.

Work vs Power Click Here for Sample Questions The main connection or distinction between the two is time. The equation to calculate work is. If you want to complete the same task quickly youll need a lot more power.

There is a parallel relationship between. W F d 181 N 23 m 42 J. If the object does any work the value of the power cannot be zero.

Work can also be measured in units like electron volt eV kWh MWh and GWh. Work Force x Displacement cos Fd cos Here is the angle between force and displacement Power P fractextTotal Work Done WtextTimet It would be easy for you to distinguish between work and power when you study the difference between work. D is measured in metresm.

An object can have a value for the power without doing any work. My daughter Katrien grabs my son Niels by the foot and drags him 23 m across the floorIf she exerted a force of 181 N to do this determine how much work she did. Work Force Displacement.

Moving a desk or bench from class 9th to class 10th with a small amount of power but it will take a little longer according to work. How much work is done by the stickman that pushes a box 5 meters with a force of 12 Newtons forward. The SI unit of power is Watt W.

In the example above 10 N is applied to move the box 2 m. When you look at the answer you just calculated youll also want to keep in mind the first definition of work. Work done 10.

The equation to calculate power is. Work force Displacement. W Fd Since the force is in the same direction as motion you plug numbers directly in and dont have to find the parallel component first.

The symbol of work is W. KW MW GW horsepower hp Relationship with Energy. Example Work and Power Problems.

Electron volt eV kWh MWh GWh. Energy is the ability to supply or create work. A horsepower is equal to 550 ft lbs and a kilowatt is 1000 watts.

Since work is a transfer of energy it applies to the example above. The SI unit of power is Watt W. Lets look at a real-life example.

Power is denoted by P.

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