In an arrangement for measuring the muzzle velocity of a rifle or pistol, the bullet is fired up at a wooden mass, into which it embeds. The wood is blasted straight up into the air to a measured height h. Assuming negligible losses to friction, write an expression for the velocity in terms of the known masses and height. Use mb for the mass of the bullet, mw for the mass of the wood, h for height and g for gravity. I got this question set in my college course, and we haven't even begun to cover momentum etc. yet, so I don't really have any ideas of how to go about answering this...any help please? Thanks a lot.