If the displacement of a horizontal mass-spring system was doubled, the elastic potential energy in the system would change by a factor of

K'=4K

Explanation:

The electric potential energy is given by :

Where

k is spring constant

x is compression or extension in the spring

If the displacement of a horizontal mass-spring system is doubled, x'= 2x

New elastic potential energy :

So, new elastic potential energy 4 times the initial elastic potential energy.

it about 600 mph from what i calculated

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