Question
A body is thrown vertically upward. The work done by
gravity is:Solution
When a body moves upward against gravity, the gravitational force acts downward while the displacement is upward. Since force and displacement are in opposite directions, the work done by gravity is negative. This negative work reduces the body’s kinetic energy as it rises.
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If 45780x52 is divisible by 72, then find the sum of all possible values of 'x'.
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If 'x' is the lowest positive integer divisible by 12, 25 and 30, then find the second smallest positive integer which is divisible by all the three gi...
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