Physics

A dart is loaded into a spring-loaded toy dart gun by pushing the spring in by a 
distance d. For the next loading?the spring is compressed a distance d/3. How much 
work is required to load the second dart compared to that required to load the first?
A)nine times as much
B)three times as much
C)the same
D)one-third as much
E)one-Ninth as much

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  1. work=1/2 k x^2 so if x is 1/3, energy must be 1/9.

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  2. D

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