Answers
mvi + MVi = mvf + MVf
1.90 ( 4.05) + 3.10( 0) = 1.90 (vf) + 3.10( Vf)
7.695 = 1.90 (vf) + 3.10( Vf)---------eq(1)
vi − Vi = −(vf − Vf)
4.05 = - vf+ Vf---------eq(2)
vf= Vf- 4.05 ( plugging this value in eq(1)
7.695 = 1.90 (Vf- 4.05) + 3.10( Vf)
7.695 = Vf( 1.90 + 3.10) - 7.695
15.39 = Vf( 5)
Vf= 3.078 m/s
vf= Vf- 4.05 = 3.078 - 4.05= -0.81 m/s
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