If the Total Potential Energy Stored in a Spring Compressed

Multiple Choice

If the total potential energy stored in a spring compressed 2 centimeters from its uncompressed length is 20.0 joules, the total potential energy stored in a spring compressed an additional 1 centimeter is (in joules)

A) 10.0.
B) 22.5.
C) 45.0.
D) 67.5.