Question

why is no work done in moving along the horizontal​

Answer 1

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• The reason that he does no work is because the force he exerts is directly upwards to balance the force of gravity and the displacement is in the horizontal direction.
• Therefore there is no component of the force in the direction of displacement (θ=90∘) and no work done.

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Answer 2

Answer:

When a body is moving horizontally , no work is said to be done .

Reason :

The formula of work is

W = FScosθ

Since the body would me moving horizontally , the gravitational force would be acting perpendicular to the direction of motion .

This means that F is perpendicular to S .

The value of cos90° = 0 and hence , work done = 0

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