Two objects with different masses are launched vertically into
the air by placing them on identical compressed springs and then releasing
the springs. The two springs are compressed by the same amount
before launching. Ignore air resistance and the masses of the springs.
Which of these statements about the masses are true? Justify each answer.
(a) Both reach the same maximum height. (b) At their maximum
height, both have the same gravitational potential energy, if the initial
gravitational potential of each mass is taken to be zero.
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