Recent content by cooper43

never mind, that made me look like a dumb *** I figured it out The amount of kinetic energy dissipated is KE=2031.25

So its KE1=3125 and KE2=1093.75 what do i subtract from what? wouldnt it normaly be KE1-KE2,,,but it would end up negative

Okay, so i did the m1v1i + M2V2i = mvf + MVf and M2=464.286 The KE of the dog is 3125 but I am not sure how to gt the other KE should it be the dog+boat and the final velocity?

Is conservation of momentum P=mv? And hat do you mean Mass of the boat. Should I leave it as M or do I replace it with the mass of the dog

Homework Statement Ive got another question that I think I might have failed at. A dog weighing 250 kg jumps into an empty boat by the dock at a speed of 5m/s causing the boat to move away form the shore at 1.75m/s. Find the amount of kinetic energy dissipated. Homework Equations...

Yes, finally. Thanks jgens :)

(800) (3) + (725) (-4) = (1525)V V = -0.328 m/s? they move to the left?

I (think I) FOUNT IT!

so is it ((M1*V1)+(M2*V2))/(M1+M2) that way velocity is isolated? Now I got -.000215 I'm moving on to the next question now

So i should use these If so, which one? i got 3.95082 with the first and 2.95082 with the second

What is conservation of momentum? formula please :P

So should I be using P=mv?

Homework Statement I was wondering if anybody might help me on this UNLESS i did this correct, but I'm not totally sure. Well here's the question. Jorge and Elizabeth are both going to the Antique Road show on PBS. Jorge pushes an antique desk weighing 300kg on a car to the right, while...