Question

Is it necessary that if displacement is zero work done is also zero?? Explain with example.

Answer 1

$\huge{\texbf{\orange{ ANSWER }}}$

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$\huge{\texbf{\red{DISPLACEMENT}}}$

Displacement is the shortest possible distance covered by a body .

$\huge{\texbf{\purple{Work}}}$

The force applied in displacing a body through a displacement of one meter .

W=F.d

Now if displacement is zero then W =zero

W = F(0)

W=0

So if displacement is zero work done will be zero

$\huge{\texbf{\purple{EXAMPLE}}}$

If a body moves in circle its initial and final points are same so displacement is zero

Therefore work done will be zero

W=F.d

W=Fdcos theta

If angle between force and displacement is 90°then work done will be zero ,As cos 90 is equal to zero

W=Fdcos(90)

cos90 =0

So

W=Fd(0)

W=0

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