In the figure, block 1 of mass mi slides from rest along a frictionless ramp from height h = 2.7 m and then collides with stationary block 2, which has mass m2 = 2m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction k is 0.55 and comes to a stop in distance d within that region. What is the value of distanced if the collision is (a) elastic and (b) completely inelastic?

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