Wood Pendulum
Posted April 20, 2009
By admin
physics speed of collision?
1. a mass m1=5g moving to the right at a speed of 100m/s undergoes a perfectly inelastic collision with a block of wood, m2= 100g, at rest. what is the speed just after the collision?
2. if the mass and block of wood described in question #1 are parts of a ballistic pendulum of length 2m, through what angle will the pendulum deflect?
Thank you very much for your help!
(1).
ΔP = 0
m v - V(m + M) = 0
5 * 100 - V(5 + 100) = 0
V = 100/21 m/s
(2).
V² = 2 g h
(100/21)² = 2 * 9.8 h
h = 1.15693 m
cos ψ = (L - h)/L
cos ψ = (2 - 1.15693)/2 = 0.421535
ψ = 65.07° with respect to vertical line
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