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Q.

The gravitational field at some point in space is g=3i^+4j^ N/kg . The force exerted on a 2kg mass placed at that point is

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a

5N, 530 with x-axis

b

5N, 370 with x-axis

c

10N, 530 with x-axis

d

10N, 370 with x-axis

answer is C.

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Detailed Solution

force exerted on m = mg
g=|g|=32+42=5
Angle made by g with x-axis = tan143=530 with x-axis
F=2×5=10N, 530 with x-axis 
 

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