(Answered) Block a of mass 20 kg slides into block b of mass 20 kg

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Block A of mass 2.0 kg slides into block B of mass 2.0 kg. Before collision, block A moves to right with speed of 5.0 m/s, and block B is stationary. After collision, block A is moves to right with speed of 2.0 m/s and block B moves to right with speed of 3.0 m/s.

(a) What is the kinetic energy change for the system?

(b) Is the collision elastic or inelastic?

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