Block 1 of mass 200 kg slides over a frictionless surface with a velocity of 0.25 cm/s and strikes block 2 of mass 100 kg sliding to the left at 0.75 cm/s. What is the final velocit y of each block if the collision is A) Perfectly elastic? B) Perfectly inelastic? C) If there is an external force of 4000 kg*cm/s^2 to the right for 0.008 s during the perfectly inelastic

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