If displacement is perpendicular to force. Then how is the result zero?

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Solution

w.d=f.s.cosA

f-force

s-displacement

A-angle between f and s

cosA=cos90

cos90=0

hence FORCE=0

EXAMPLE-

here is how you can fool a coolie

he carries luggage on his head so force is in upward direction and he is moving forward so displacement is in forward direction . hence work done by coolie=0

no workdone = no money
scientifically

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Similar questions

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.
3.Force is parallel to displacement.
4.Force is opposite to the direction of displacement.

Question:

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.
3. Force is parallel to displacement.
4. Force is opposite to the direction of displacement.

is option (a) true also?

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a_{c m} =

_____ and

v_{c m} =

______.

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

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