What is work? Give two examples,"how work is done " What is relation between work and energy.( only in 3 points ) answer in shot only
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Answer:
What is work?
=> In physics, work is the process of energy transfer to the motion of an object via application of a force, often represented as the product of force and displacement. A force is said to do positive work if the force has a component in the direction of the displacement of the point of application .
What is work? Give two examples .
=> Examples: Pushing a car horizontally from rest; shooting a bullet (the powder does the work); walking up stairs; sawing a log .
how work is 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 relation between work and energy.
=> In physics we say that work is done on an object when you transfer energy to that object. ... The force is equal to the weight of the object, and the distance is equal to the height of the shelf (W= Fxd). Work-Energy Principle --The change in the kinetic energy of an object is equal to the net work done on the object.