
pleaseee Physics Collision Help?
The large block of wood has a mass M2 = 3.000 kg, and the bullet has a mass of m1 = 30 g. In this problem the bullet completely penetrates the wood and emerges with a speed of vf = 40.0 m/s. The wood, as part of a pendulum, swings up to a maximum height of h = 8.0 cm.
(a) Determine the speed of the block of wood after the bullet has passed through it.
(b) What is the speed of the bullet initially?
a) V2b = √(2*g*h) = √(2*9.8*.08) = 1.252 m/s
b) Pb = Pw → m1*(vi - vf) = M2*V2b → .03*(vi - 40) = 3*1.252
solving,
vi = 165.2 m/s
Since the bullet doesn't remain in the block, the 2 masses should not be added together in any part of the calculation.
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