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Work, Energy And Power

Question

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Is work a scalar or a vector quantity?

Solution

Work is dot product of two vectors. i.e.

F with rightwards arrow on top times S with rightwards arrow on top

.
And dot product is a scalar quantity. Therefore, work is a scalar quantity.

Some More Questions From Work, Energy and Power Chapter

What is watt?

Define watt.

How many joules are there in one eV?

What is the relation between kWh and Joule?

Does the body at rest possess energy?

By eating two apples, a person starts pushing the wall of room. If food value of apple is 100 calories per apple, how much work he will do in pushing the wall in one hour?

A man is rowing upstream and is at rest w.r.t. shore. Is he doing work w.r.t. shore?

Is frictional force conservative?

What is the work done by gravitational force in taking the mass m with constant velocity through height h?

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