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

Q: A particle moves with a velocity $ 5 \hat{i} – 3 \hat{j} + 6 \hat{k} $  m/s under the influence of a constant force $ \vec{F} = 10 \hat{i} + 10 \hat{j} + 20 \hat{k} $  N . The instantaneous power applied to the particle is

(a) 200 J/s

(b) 40 J/s

(c) 140 J/s

(d) 170 J/s

Ans: (c)