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## Homework Statement

A 45.0-g object connected to a spring with a force constant of 40.0 N/m oscillates with an amplitude of 6.00 cm on a frictionless, horizontal surface.

a) find the total energy of the system (mJ)[/B]

## Homework Equations

1/2KA^2

[/B]

## The Attempt at a Solution

Is the force constant the same as the spring constant 'K' here ? or will i need to determine 'K' by using Hooke's Law? f=-kx and then rearrange for -k=f/x?

also does the A have to be converted into m or can i just plug in 6.00cm?[/B]