A question regarding power and hookes law

[physicskid72]

Homework Statement

A 2.8 m high spring has a spring constant of 12 N/m. How much power is required if the spring is compressed 1.2 m in 2.5s?

Homework Equations

Pe= 1/2kx^2

Power= W/t

The Attempt at a Solution

=1/2(12)(1.2)^2
=8.64 J

so... Power = 8.64/2.5

= 3.456 watts

is this correct? thanks in advance!

 

[Doc Al]

Looks good to me.