1.

A particle moves with velocity (6hat(i)-4hat(j) + 3hat(k))ms^(-1) under the influence of a constant force F = 20 hat(i) + 15hat(j)-5 hat(k) N. The instantaneous power applied to the particle is:

Answer»

35 J/s
45 J/s
25 J/s
195 J/s

Solution :`VEC(F).vec(U)=20hati + 15hatj - 5hatk.(6hati - 4hatj + 3hatk)`


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