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NEET 2009 (AIPMT) · Inertia, First & Second Laws

Inertia, First & Second Laws question from NEET 2009 (AIPMT)

Q38NEET 2009 · AIPMTEasy

Inertia, First & Second Laws

A body, under the action of a force F⃗=6i^−8j^+10k^,\vec{F} = 6\hat{i} - 8\hat{j} + 10\hat{k}, acquires an accelerations of 1 m/s2. The mass of this body must be

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Answer: (c)

  1. ∣F⃗∣=62+82+102=200=102 N|\vec{F}| = \sqrt{6^2 + 8^2 + 10^2} = \sqrt{200} = 10\sqrt{2}\text{ N}
  2. m=Fa=1021=102 kgm = \frac{F}{a} = \frac{10\sqrt{2}}{1} = 10\sqrt{2}\text{ kg}
  3. So the answer is (c) 10210\sqrt{2} kg.
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