(b) What is work? Mention its types.
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Numerically, work is the dot product of force and displacement. W = F×d×cos theta
It can be positive, negative and zero (when you apply force on a wall it doesn't show any displacement in that case work is said to be zero)
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when an object is displaced by an applied force work is said to be done.
Work done = force X displacement
the types of work are :
zero work , positive work , negative work
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