Work done is said to be zero if the applied force is .............. to the direction of displacement.

perpendicular

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parallel

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anti parallel

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at any angle

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Solution

The correct option is A perpendicular
Work done by a force is zero if the applied force is perpendicular to the direction of displacement.
we know
$W = F \times S \times c o s θ$
for zero work done
$θ = 90; c o s 90^{0} = 0;$
so, Work done will be zero.

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A non-zero force is acting on a body but work done is zero. Which of the following statements justify the above situation?

1.Displacement is zero.
2.Force is perpendicular to the direction of displacement.
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4.Force is opposite to the direction of displacement.

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Work done is said to be zero if the applied force is .............. to the direction of displacement.

The correct option is A perpendicularWork done by a force is zero if the applied force is perpendicular to the direction of displacement.we knowW=F×S×cosθfor zero work doneθ=90;cos900=0; so, Work done will be zero.

The correct option is A perpendicular
Work done by a force is zero if the applied force is perpendicular to the direction of displacement.
we know
$W = F \times S \times c o s θ$
for zero work done
$θ = 90; c o s 90^{0} = 0;$
so, Work done will be zero.