A block of mass 100 g, resting on a frictionless surface, is pushed up against a spring compressing it and doing work of 20 J on it. When the block is released, the spring exerts a force on it and causing it to accelerate. The speed of the block as it loses contact with the spring is a. 5 m/s b. 10 m/s c. 15 m/s d. 20 m/s e. There is insufficient information to determine the speed of the block.

Principles of Physics: A Calculus-Based Text
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ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter7: Conservation Of Energy
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  1. A block of mass 100 g, resting on a frictionless surface, is pushed up against a spring compressing it and doing work of 20 J on it. When the block is released, the spring exerts a force on it and causing it to accelerate. The speed of the block as it loses contact with the spring is

      a.

    5 m/s

      b.

    10 m/s

      c.

    15 m/s

      d.

    20 m/s

      e.

    There is insufficient information to determine the speed of the block.

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