When the force and the displacement are in the opposite directions, the work done by the force is ..........

p o s i t i v e

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n e g a t i v e

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z e r o

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n o t f o r m t h i s

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Solution

The correct option is B $n e g a t i v e$
Work done by the force,
$W = \to F . \to r = F r c o s θ$ . . . . . . . .(1)
If the force and the displacement are in the opposite direction, then angle between the force and the displacement is $180^{0}$
$c o s θ = c o s 180^{0} = - 1$
from equation (1),
$W = - F r$
The work done by the force is negative.
The correct option is B.

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