When a force is applied to a moving body, its motion is retarded. Then, the work done is

positive
negative
zero
positive and negative

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Solution

The correct option is B
negative

The explanation for correct option:
Option (B):
When the direction of force is such that it opposes the motion of the body it is said to be negative work done.
$W o r k d o n e (W) = \vec{F} . \vec{s} = |\vec{F}| |\vec{s}| \cos θ = - F s \cos θ h e r e (θ > 90 °)$
Where $\vec{F} =$ Force applied
$\vec{s} =$ Displacement of the body
$θ =$ Angle inclined between force and direction of motion
Hence, the correct answer is option (B).

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When a force is applied to a moving body, its motion is retarded. Then, the work done ispositivenegativezeropositive and negative

When a force is applied to a moving body, its motion is retarded. Then, the work done is

positive
negative
zero
positive and negative