Q. 14.5( 13 Votes )

Define work and write its units.

Answer :

In science, we define Work as product of the Force(F) & the Displacement(s) moved along the direction of force

W = Force Displacement -- (i)

This formula for work used in only Translatory motion of the object.

Work has only Magnitude, no Direction. So, work is a Scalar quantity.

The SI unit of Force(F) is Newton(N) and Displacement(s) is meter(m).

Putting 1N and 1m in formula of work eq(i), work done comes out to be 1N-m.Hence unit of work is newton-meter(N-m) or joule(J).

Fig - Work done in moving a block through a distance ‘s’ and by appling force’F’

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Define work and write its units.

AP - Physics & Chemistry