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The gravitational potential in a region ...

The gravitational potential in a region by V = (20x + 40y)j/kg. Find out the gravitational field (in newton /kg) at a point co-ordinates (2,4). Also find out the magnitude of the gravitational force on a particle of 0.250 kg placed at the point (2,4) .

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The correct Answer is:
`-20 hati - 40 hatj |vecF| = 5 sqrt5 N, vecF = - 5hati - 10 hatj` .
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