- #1
maniacp08
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A bullet of mass m is fired vertically from below into a thin horizontal sheet of plywood of mass M that is initially at rest, supported by a thin sheet of paper. The bullet punches through the plywood, which rises to a height H, above the paper before falling back down. The bullet continues rising to a height h, above the paper.
a)Express the upward velocity of the bullet and the plywood immediately after the bullet exits the plywood in terms of h and H.
b)What is the speed of the bullet?
c)What is the mechanical energy of the system before and after the inelastic collision?
Relevant equations:
Momentum = M * V
Conservation of energy = Ui + Ki = Uf + Kf
What should I do first?
The bullet makes an inelastic collision first with the plywood so the KE is not conserved and it continues to go past the plywood.
For part A:
Im not too sure on how to express the upward velocity in terms of h and H, actually I am just confused at the question.
For Part B:
Im stuck here too...
For Part C:
Do I do Ui + Ki = Uf + Kf where initial is before the collision and final is after?
a)Express the upward velocity of the bullet and the plywood immediately after the bullet exits the plywood in terms of h and H.
b)What is the speed of the bullet?
c)What is the mechanical energy of the system before and after the inelastic collision?
Relevant equations:
Momentum = M * V
Conservation of energy = Ui + Ki = Uf + Kf
What should I do first?
The bullet makes an inelastic collision first with the plywood so the KE is not conserved and it continues to go past the plywood.
For part A:
Im not too sure on how to express the upward velocity in terms of h and H, actually I am just confused at the question.
For Part B:
Im stuck here too...
For Part C:
Do I do Ui + Ki = Uf + Kf where initial is before the collision and final is after?