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physics

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Block a is moving with a certain acceleration along a frictionless horizontal surface. When a second block B is placed on top of block A, the acceleration of the combined block drops to 1/5 the original value. What is the ratio of the mass of A to the mass of B :

  • physics -

    The force that does the accelerating presumably stays the same. The acceleration rate drops by the same ratio that the total mass rises. That ratio is 5.

    (MB + MA)/MA = 5

    MB = 4 MA

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