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Darth Frodo
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Homework Statement
A smooth sphere collides with an equal sphere which is at rest. Before the impact the line of motion of the first sphere makes an angle A with their line of centers, after the impact this is angle B. The coefficient of restitution is 1/4. Show that 8TanA = 3TanB
Homework Equations
-e = (V1 - V2) / (U1 - U2)
M1U1 + M2U2 = M1V1 + M2V2
The Attempt at a Solution
Initial Velocity 1: (XcosA i + XsinA j)
Initial Velocity 2: (0i + 0j)
Final Velocity 1: (YcosB i + YsinB j)
Final Velocity 2: (P i + 0 j) XsinA = YsinB. J components are equal.
Coefficient of restitution
-1/4 = [YcosB - p] / [XsinA]
-XsinA = 4YcosB - 4pConservation of momentum in i direction
masses are equal.
U1 + U2 = V1 + V2
XcosA = YcosB + p
XcosA - YcosB = p-XsinA = 4YcosB - 4( XcosA - YcosB )
-XsinA = 8YcosB - 4XcosA
-XsinA / -XcosA = 8YcosB /-XcosA -4XcosA /-XcosA
Tan A = (8YcosB) / (-XcosA) - 4