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## Homework Statement

a mass spring system vibrates with an amplitude of 4.5 cm. if the spring has a constant od 250 n/m and the mass is 400 kg determine the

a) total mechanical energy

b) the maximum speed of the mass

c) the maximum acceleration

d) the speed of the mass when the displacement is 2.0 cm

## Homework Equations

e= 1/2mv^2 + 1/2 kx^2

e= 1/2 ka^2 = 1/2 mv^2(max)

e=1/2 mv^2 + 1/2 kx^2

e= 1/2 mv^2 + mgh

## The Attempt at a Solution

1/2 (400)(0)^2 + 1/2 (250)(4.5)^2= 2531.25?

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