00:02
Welcome to this numerary tutorial.
00:04
So we can start by realizing there is a negligible loss of vertical, vertically fired bullet velocity at close range.
00:17
So we can ignore any loss of velocity firing upward.
00:23
And then the conservation of energy, potential energy, is equal to kinetic energy.
00:28
So pe, potential energy is equal to mgh, and k .e is equal to mgh, and k .e is equal to.
00:35
1 half mv squared.
00:36
So if we use the potential energy formula mgh to quantify the transfer of kinetic energy from the bullet to the block, we can then first calculate the kinetic energy that is absorbed by the block as the bullet passes through the block itself.
01:01
And so first, that would actually be the 1 .57 kilogram block times gravitation.
01:07
Acceleration 9 .81 meters per second squared times the block's maximum height attained 1 .23 meters.
01:17
And so the calculated potential energy will equal the kinetic energy absorbed by the block, which is computed to 19 joules...