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Classical Mechanics Level 1

The SI unit of work is?

Calorie Watt Joule Farad

2 solutions

Sravanth C.
May 13, 2015

Work is actually equal to $F \times s \times cos \theta$ .

Where, $F$ is the force applied.

$s$ is the displacement due of the force.

$\theta$ is the angle between the force and displacement.

Hence the SI unit of work is $Nm$ , it is also called $Joule$ in honor of James Prescott Joule .

$\theta$ is the angle between $F$ and $s$ vectors and not the angle from the horizontal.

Rohit Ner - 6 years, 1 month ago

Thanks for pointing that out, corrected it.

Sravanth C. - 6 years, 1 month ago

You mean F dos s

Michael Ladd - 6 years ago

That is F dot s

Michael Ladd - 6 years ago

Well, the dot product between two vectors is |a||b|cos(ø). So the dot product between f and d is Fd cos theta.

Krishna Karthik - 2 years, 6 months ago

Rama Devi
May 14, 2015

That was easy.It is commonly known that the S.I unit of work is Joule.