Physics
(a) What should be the angle between the direction of force and the direction of displacement, for work to be negative?
(b) Name the physical quantity obtained using the formula , where U is the potential energy and h is the height.
Work, Energy & Power
ICSE 2023
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Answer
(a) 180°
(b) As gravitational potential energy [U] = mgh
Hence, = mg
Therefore, the physical quantity obtained is weight of the object.
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