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2. When a 0.10 kg ball is launched with an initial
velocity Vi,ball+cup into a stationary cup with mass 0.15
kg, the ball and cup rise 1.87 cm (or 0.0187 m).
Determine the initial velocity of the ball and cup
Vi,ball+cup. (Hint: use the Conservation of Energy
Equation).
Pivot point
Center of mass
when ball is in
the cup
L
8=25 L
i,ball+cup
Ah = 1.87 cm

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