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Question

Gravitational potential in a region is given by v=(x+y+z)J/kg. Find the gravitational intensity at (2, 2 ,2)

A
(^i+^j+^k)N/kg
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B
2(^i+^j+^k)N/kg
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C
3(^i+^j+^k)N/kg
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D
4(^i+^j+^k)N/kg
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Solution

The correct option is A (^i+^j+^k)N/kg
We know formula V=u.dr
or G=dvdr where h is gravitational field intensity, V is gravitational potential and dr is position vector.
given V=(x+y+z)
We have to use partial derivative
Gx=δ(x)δx^i
Gx=^i
Similarly we get, Gy=^jh2=k
now G=^i+^j+^k

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