Gravity Suspension

A wooden block of mass 0.9 kilograms is suspended from the ceiling of a room by thin wires.

A bullet of mass 0.1 kilograms moving with a horizontal velocity of 100ms1100 ms^{-1} strikes the block and sticks to it.

What is the height to which the block rises?

Details and assumptions:
To make the calculations easier take the acceleration due to gravity as 10ms210ms^{-2}

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