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A force of 6 kg-wt and another of 8 kg-wt can be applied together to produce the effect of a single force of:

1. 1 kg-wt
2. 11 kg-wt
3. 15 kg-wt
4. 20 kg-wt

Correct answer: 11 kg-wt

Solution

The magnitude of the resultant of two vectors of magnitudes 6 and 8 can vary from |8-6| = 2 to 8+6 = 14. Among the options, 11 kg-wt is possible. Hence it can be the effect of a single force.

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