Simple harmonic motion/static equilibrium -spring problem, mass given

AI Thread Summary
A 0.500 kg mass suspended from a spring is analyzed for its oscillatory motion, with key parameters including period, amplitude, maximum acceleration, and spring constant. The velocity function is given as Vx(t) = -ωAsin(ωt + φ), and the relationship between force, mass, and spring constant is explored through the equation Fspring = -kΔy. The discussion highlights the need for additional data to solve for three unknowns: k, ΔL, and T, but suggests that the problem can be approached by determining the position and velocity functions over time. A hint is provided to calculate the maximum velocity and the time at which the velocity is half of its maximum, which could help derive the necessary parameters. The conversation emphasizes that the problem can be solved with the given information if the mass is initially displaced.
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Homework Statement



A 0.500 kg mass is suspended from a spring and set into
oscillatory motion. A motion detector is used to record the motion, and it is found that its velocity function is given by Vx(t) What are:
a. the period of the motion;
b. the amplitude;
c. the maximum acceleration of the mass; and
d. the force constant of the spring?

Homework Equations


given
Vx(t)=-ωAsin(ωt+\phi)
not given but seems like the way I need to head
Fspring=-k\Deltay
T=2pi\sqrt{m/k}

The Attempt at a Solution


Did FBD where Fspring=-k\Deltay is straight up and weight=4.9N goes straight down. Giving Fnety=
K\DeltaL-mg=0
K\DeltaL=mg? can I make this assumption or am I missing something?
Also I have three unknowns k,\DeltaL, T and can't find another equation to substitute into for third variable. I just need to know if I am heading in the right direction for this problem.
 
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To solve the problem, one more data is essential.
 
Yes I agree, but none was given, so I was hoping that someone might see something:-(
Thank you for taking a look!
 
No, I believe it can be solved with the given info, provided that the mass was set in motion in the usual way by imparting an initial displacement to the system at rest.

Hint: determine x(t) and dx/dt as functions of time. Determine maximum dx/dt. Then determine time t1 at which dx/dt is half of max. This I believe allows solving for every parameter.
 
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