Question: A 5.0 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just

A 5.0 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just reach a target 20 m above the marble's position on the compressed spring.

(a) What is the change LU, in the gravitational potential energy of the marble-Earth system during the 20 m ascent?

(b) What is the change A U, in the elastic potential energy of the spring during its launch of the marble?

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