Question
Two identical pucks collide with coefficient of restitution e =0.8. Before impact, Va=7 m/s and Vb...
Two identical pucks collide with coefficient of restitution e =0.8. Before impact, Va=7 m/s and Vb = 3 m/s. Determine magnitude of velocity of each puck after impact. Define coordinate system. Determine component velocities of each puck after impact. Calculate two components of each velocity before impact. 2001
Answers
solution 771 VB VBY 10 Bar MA= mg VA = 7 m/s NB= 3 m/s 20 WAY Z VAR (VA)x, = 7C0320 -- 6.6 m/s (VA) y, 7 sin 20 = 2.4 m/s (UB), = 3 sin ao 1.02 m/s ((B) y, = 3cos 2o = 2.81 m/s Since y axis velocity will remain Same before & after collision in the direction of collision VAR + VBX2 e-0.8 - 6.6 +1.02 VABZ TVB 2 2 = 6.09 rysBalancing momentum 6.6m -1.02 m - -(m) (Vax_z) + (m VBx2) - Vboli - Voda = 5.58 from ① & ② Vodz = 5.58 + Vana = 6.096 – VAD2 => Vaar -0.25 8 mis VB x 2 = 5.838 m/s After impact VAR / 258 + 2.4 = 8:41 m/s Vot = 55.87+218) = 6.47 m/s
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