A pendulum bob of mass m starting at a height of 0.2 m, which is also the string length L) collides with a block of mass 3m at the bottom of its swing.The block proceeds to move d=20 cm along a surface with a coefficient of friction equal to 0.25 before coming to rest.What happens to the pendulum bob after the collision (i.e. how high does it go and in what direction)? Is the collision elastic or inelastic?

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