A particle moves with a velocity v→=(5i^−3j^+6k^) ms−1 under the influence of a constant force F→=(10i^+10j^+20k^)N. The instantaneous power applied to the particle is

A particle moves with a velocity v=(5i^3j^+6k^) ms1 under the influence of a constant force F=(10i^+10j^+20k^)N. The instantaneous power applied to the particle is

  1. A

    200 J s1

  2. B

    40 J s1

  3. C

    140 J s1

  4. D

    170 J s1

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    Solution:

    P=Fv=5030+120=140 J/sec

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