Maximum speed of an object after a spring

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The discussion focuses on calculating the maximum speed and acceleration of a mass connected to a spring on a frictionless track. The mass is 534 g, the spring constant is 6 N/m, and the initial displacement is 2 cm. Participants discuss the relevant formulas, including potential energy in the spring, PE=(1/2)(k)(x²), and the need for proper calculations to determine maximum speed and acceleration. One user initially calculated a maximum speed of 0.037 m/s, which was questioned as being too low, prompting requests for detailed calculations. Accurate application of the formulas is essential for determining the correct values.
liamtcarroll
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A 534 g mass is connected to a light spring of
force constant 6 N/m that is free to oscillate
on a horizontal, frictionless track. The mass
is displaced 2 cm from the equilibrium point
and released from rest.

What is the maximum speed of the mass?

What is the maximum acceleration of the mass?

I found the period to be 1.87

Now I don't know what formula to use for the maximum speed, or to find the maximum acceleration.
 
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Do you know the formula for the energy stored in a spring? What will the stored energy be when the mass is at max speed?
 
is it Hooke's law?
 
wait is it PE=(1/2)(k)(x²)?
 
i got .037 m/s for my speed, does that sound right?
 
liamtcarroll said:
i got .037 m/s for my speed, does that sound right?
Sounds too low. Pls post your working.
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

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