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  1. A body under the action of a force F = 6î - 8ĵ + 10̂k , acquires an acceleration of 1 m/s². The mass of this body must be​
    1. 10 kg
    2. ​20 kg
    3. 10√2kg
    4. 2√10kg
Correct Option: C

F = 6î + 8ĵ + 10̂k,
|F| = √36 - 64 + 100 = 12√2 N
(∵ f = √F²x + F²y + F²z)
a = 1 ms–2

∴ m =
10√2
= 10√2 kg
1



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