Recent content by cxza

That seems good, just I am not sure how to do it exactly😅

I gotta go now, i will read your answers tomorrow, thank you all for the help

I'm think my first step will be to get rid of the mass in the equation as the answer is supposed to be in terms of v

So in this case the velocity of the fly will be the same as the velocity of the elephant, which my teacher has said is not the answer he is looking for.

So what if I take it as an inelastic collision, then of course the energy will no be conserved, so I can only use the fact that the momentum will be conserved.

My teacher didn't give us any values, the solution is supposed to be "theoretical" if that makes sense. Not using any values.

Well, can we assume that the change in momentum of the elephant on negligible? But this would mean that the momentum of the fly will also not change. I took me=6000kg, ue=10m/s, ve=9.9m/s, mf=0.045g If I use these values I get that the speed of the fly is more than 13 000m/s.

I am not sure, I guess conservation of kinetic energy and conservation of momentum. I am an IB Physics student and it's the first semester so it's not very advanced.

He told us it is a question that was given to him by his teacher, so I am pretty sure he's for real. 3 decimal places is definitely enough. I don't have a lot of working because I have no idea how to approach this problem. He also mentioned we should assume it is an elsatic collision, so I...

My solution was that the final velocity of the fly is equal to the mass of the elephant divided by the mass of the fly, and then multiplies by the delta in the elephant's velocity. My teacher said it was the wrong answer and that the calculations are presumably pretty long