Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions


P = dw/dt
dw = F dot ds
dw = (2i +4j) dot (3j +5k)
   = 12 J
P = 12/2
  P = 6 W
0 0 0
what are you not understand in this step?
how is dot roduct obtained?
Sorry the above statement should have been" How is dot product obtained"??
dot product obtained ; multiply magnitude of two vector and cos(theta) where theta = angle between two vector for above Example 2*3*cos90 = 6*0 = 0 (angle between i and j vector is 90). i hope you will understand if any doubt please ask me.
Thank You Mr.Vikaskumar!!
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts