Find the power input of a force acting on a particle that moves with a velocity for each of the following situations.
(a) f = 4 N i+ 3 N j, v= 8 m/s

(b) f= 8 N i - 5 N j, v= - 7 m/s + 4 m/s

(c) f= 3 Ni + 7 Nj , v = 2 m/s + 3 m/s

Question

Find the power input of a force  acting on a particle that moves with a velocity  for each of the following situations.
(a) f = 4 N  i+ 3 N j,  v= 8 m/s

(b)  f= 8 N i - 5 N j,  v= - 7 m/s  + 4 m/s

(c)  f= 3 Ni  + 7 Nj , v = 2 m/s  + 3 m/s

anonymous · Answer

I used dot products, and I used a magnitude force multiplied by the velocity both of which netted wrong answers.

anonymous · Answer

I figured it out, you are supposed to treat the missing y and z values as zeros and continue the dot product as such.