Physics: IX Work, Energy and Power Study notes and CBSE Guess and Test Paper also download Numerical
Work : Product of magnitude of force and the magnitude of displacement of the body during time in which force acts is called work. Work is a scalar quantity.
If W, F and s indicate work, force and displacement respectively then the work is given by the following formula. W = F s
SI unit of work is newton metre (Nm) which is also known as joule in memory of famous physicist Joule.
Thus, for work to be done, action of force is necessary as well as displacement in the direction of force is also necessary.
What will be the work done if angle between the force and displacement is 900 ?
Ans: work done is zero
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Physics: IX Work, Energy and Power
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