A particle moves with a velocity (5hati-3hatj+6hatk) m/s under the influence of a constant force vecF = (10hsti+10hatj+20hatk) N. The instantaneous power applied to the particle is

A particle moves with a velocity (5hati-3hatj+6hatk) m/s under the inf

1.	A particle moves with a velocity (5hati-3hatj+6hatk) m/s under the influence of a constant force vecF = (10hsti+10hatj+20hatk) N. The instantaneous power applied to the particle is
Answer» 200 W 40 W 140 W 170 W Solution :As `vecv = (5 HATI + 6 hatk) m//s, vecF (10 hati + 10 hatj + 20 hatk) N` `:.` Power = `vecF. Vecv = (10 hati + 10 hatj + 20 hatk). (5 hati - 3hatj + 6hatk)` `= 50 - 30 + 120 = 140 W`