Define work . Explain its types …
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Posted by Arun Singh 6 years, 8 months ago
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Yogita Ingle 6 years, 8 months ago
Work is said to be done when a force applied to an object moves that object. The SI unit of work is the joule (J) . We can calculate work by multiplying the force by the movement of the object. W = F × d
Positive Work
So, W=Fd
The example of this kind of work done is motion of ball falling towards ground where displacement of ball is in the direction of force of gravity.
Negative work
For example if a ball is thrown in upwards direction, its displacement would be in upwards direction but the force due to earth’s gravity is in the downward direction.
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