WORK:
The dot product force between displacement is termed work.As for work to be done, a brigade should be produced and there must be motion or displacement within the command of the force. The beat up by an Associate in Nursing object is capable the magnitude of the force accumulated by the space shift within the direction of the force. Work has a small amount and no direction.
Hence, work could be a scalable amount. we have a tendency to perceive concerning the formula of (Work).The work done by a brigade is established to be the merchandise of the
component of the force within the conduct of the displacement and therefore the measure of this displacement. We have a tendency to know concerning work equations if there's no displacement and as a result, no work is wiped out. Summary if that displacement is
zero The force is additionally zero and therefore the force and displacement are jointly at right angles to one another
The SI unit of labor is joule:
Example, if a force of eight newtons is applied to an Associate in Nursing object, so move half-dozen meters and a result, the work is going to be forty-eight newtons or forty-eight joule.
Example of labor an object is horizontally hauled to the far side of the surface by a two hundred N force acting parallel to the surface. ascertain the quantity of labor done by the force of moving the article over a distance of fifteen m.
Solution:
Given:
F = 200 N, d = 12 m
As we all know, because force and displacement are within the same
direction, ? = 0, [? is that the angle of the force to the direction of
movement], therefore
W = FdCos?
W = 200x twelve x Cos zero
W = 2400 J [Since Cos zero = 1]
Power: The ability to doing work is called power.
Unit: The power unit (TIME)
Another example of power is that work*time is called Power:
The unit is power is watt (W) and is we know that 1 joule/second= (1w=1J/s)
this is a work which work is energy transfer.
EXAMPLE= The power is also rate at which energy dilate or inflate 80 light bulb,
the Expands 60 J of energy per second
Energy : The capability to do work is called energy.
Example: Light energy , chemical energy, Heat energy, Electrical energy, Mechanical energy, Gravitational energy, Sound energy,
Atomic energy,
We know that all this form converted or change into other forms.
the big knowledge about energy mean that the energy can be change to other form but not destroyed always.
why energy not destroyed?
By the law of energy can not be created nor destroyed only convert one form into other form this phenomenon is called Energy.
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