Question

A particle moves with a velocity v = 6 i - 4 j + 3 k m / s under the influence of a constant force F = 20 i + 15 j - 5 k N. The instantaneous power(P) applied to the particle is ( Given P = F.v)​

Answer 1

Answer:

F = 20 i + 15 j - 5 k ;

v = 6 i - 4 j + 3 k

F. ($\frac{ds}{dt}$) = rate of doing work = Power = ( 20×6 - 15×4 - 5×3) = 120 -60 - 15 = 45 unit.

If the unit of force was Newton, then since unit of velocity is m/s, the unit of instantaneous power is 45 watt

Answer 2

Answer:

45 watt

hope it is helpful to you buddy