Q.

Out of the following set of forces, the resultant of which cannot be zero?

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a

10, 10, 10

b

10, 10, 20

c

10, 20, 20

d

10, 20, 40

answer is D.

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Detailed Solution

In all the options except D, the sum of two forces is greater or equal to the remaining forceHowever, For option D, 10+20=3030<40Hence, the resultant can not be zero for option D.
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