Recent content by Platon7

Okey, that you for help:smile:

but when we assume that the bullet has penetrated and left the block, can we solve the problem?

yeah, because after dividing both parts for (m1+m2) we will get sth, that I have already mentioned above

do you mean (m1+m2)*g*h = (m1+m2)*u^2/2?

I didn't really understand that, so you mean, m1*v1^2 = (m1+m2)*g*h. I'm not sure about the right part of equation

oh, now I see, then we can find h using (v^2-v0^2)/(2*a), right?

I don't know, rectilinear also, we know the velocity before penetrating

decelerated by g

oh, yeah, v'1 = v'2 = u, then we can calculate u, but what's next step?

m1*v1 = m1*v'1 + m2*v'2, where m1 and m2 - are masses of bullet and block respectively, v1 - velocity of bullet before the collision, v'1 and v'2 - after

it is a full statement as I have written

Yeah, I didn't think about that and it makes sense, because while penetrating almost for sure some energy was spent on heating the block, but then how am I suppoused to move further with solution?

As far as I understood, goes through and continues moving.

I don't know, the system seems to be closed

I have tried the following. Firstly, we can write the law of conservation of impulse m1*v1 = m1*v'1 + m2*v'2, that is the first equation for the system. Then we can write the law of conservation of energy, like KE1 + KE2 = PE1 + KE'2, and then we can substitute formulas, but as far as I can see...