A block is struck by a pendulum bob at the lowest point in its swing. How much faster will the block's initial speed be after being struck if the bob is swung from four times the height if the bob and the block have the same mass and the collision is perfectly elastic?

general knowledge science & technology

  1. 2 times as fast

  2. 16 times as fast

  3. 4 times as fast

  4. the same speed

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Correct Option: A

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