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charmedbeauty
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Homework Statement
A baby bounces up and down in her crib. Her mass is 10.5 kg, and the crib mattress can be modeled as a light spring with force constant 654 N/m.
The baby soon learns to bounce with maximum amplitude and minimum effort by bending her knees at what frequency?
b)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?
Homework Equations
The Attempt at a Solution
for the first part I just did
T=2∏√(m/k)
and f=1/T
f= 1.256
for part b)
ω=2∏/T
T=1/f
ω=2∏(1.256)
=7.89
is this method correct for b)