A particle moves with a velocity 6i – 4j + 3k m/sunder the influence of a constant force F = 20 i + 15 j – 5 k N The instantaneous power applied to the particle is

Q: A particle moves with a velocity $ 6 \hat{i} – 4 \hat{j} + 3 \hat{k} $ m/sunder the influence of a constant force $ \vec{F} = 20 \hat{i} + 15 \hat{j} – 5 \hat{k} $ N . The instantaneous power applied to the particle is

(a) 35 J/s

(b) 45 J/s

(c) 25 J/s

(d) 195 J/s

Ans: (b)