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Q.

Is it true that work done against gravity is negative?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
Work done depends on the force applied to an object, its displacement, and the angle between the direction of force applied and displacement. When an object moves upward, displacement is upward, and the gravitational force acting is towards downwards (opposite to that of displacement), making an angle of 180o As cos 180o=-1.
So, W= -Fs, this means work done against gravity is negative.
 
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