Homework Help: PHYSICS

Posted by gill on Thursday, May 20, 2010 at 6:27am.

A baby bounces up and down in her crib. Her mass is 13.5 kg, and the crib mattress can be modeled as a light spring with force constant 682 N/m.

If she were to use the mattress as a trampoline—losing contact with it for part of each cycle—what minimum amplitude of oscillation does she require?

PHYSICS - Damon, Thursday, May 20, 2010 at 6:41am
w = 2 pi f = sqrt(k/m)

x = A sin wt

v = A w cos wt

a = -A w^2 sin wt

max a = A w^2 = g
so
g = A w^2
A = g m/k
PHYSICS - Anonymous, Friday, May 21, 2010 at 4:39am
to damon. that doesnt help. be more detailed.

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