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Find the spring potential energy, U, the kinetic energy of the block, K, and the total mechanical energy of the system, E, for compressions of (a.) 0 cm, (b.) 1.00 cm, (c.) 2.00 cm, (d.) 3.00 cm, (e.) 4.00 cm.

HELP!

I've been using the equations:

spring potential = 1/2*force constant*length^2

kinetic = 1/2*m*v^2

total = Spring + kinetic