# Recent content by EthanVandals

1. ### Simple Harmonic Motion of a Spring?

I tried what they said above and I was able to get some answers. Probably not enough to get an A, but maybe enough to get some points to add to the other problems. I do not think you are biased. The suggestions about using my notes and textbook will not work, as there were no notes involving...
2. ### Simple Harmonic Motion of a Spring?

I'm glad I'm not the only one who thinks so. Thank you for the advice!
3. ### Simple Harmonic Motion of a Spring?

Yes. The professor mentioned that calculus is a method of solving these kinds of problems and many others, but he said we are not supposed to use calculus whatsoever.
4. ### Simple Harmonic Motion of a Spring?

Is there a way to do it without taking the derivative? I could do that, but this course is supposed to be solely algebra based...
5. ### Moon orbiting Earth?

I mean, for PE, the only thing that shows up is mgh when I search it online. I also know that Centripetal Force and speed are related in the fact that the object must be moving at a certain speed, or else it would get pulled to the center, or it would go flying away and leave orbit. I found an...
6. ### Simple Harmonic Motion of a Spring?

Homework Statement If a mass attached to a spring has motion given by the equation X(t) = 5(sin(3pi(t))), what is the equation for the acceleration of the spring? What is the angular speed of the spring,and what is its frequency and period? If the spring has a spring constant of 900 N/m, what...
7. ### Moon orbiting Earth?

Homework Statement Calculate the potential energy and kinetic energy of the moon, as well as it's escape velocity. Give the moon's period and angular speed. Consider the Earth to have a mass of 6 x 10^24 kg, the moon to have a mass of 7 x 10^22 kg, and their center separation distance to be 4 x...
8. ### Gravitational Force in terms of Density?

That's most likely what I will do. Thank you for the help! :) yeah, it is somewhat unusual..I'm not sure in what scenario I'd use it, but maybe it'll show up sometime in the fluids section.
9. ### Gravitational Force in terms of Density?

Thank you for the rapid response! Our class is algebra based physics, and our professor does not want us using things like integrals and other pieces of calculus. Is there a way to determine it algebraically? Thanks!
10. ### Gravitational Force in terms of Density?

Homework Statement Express the gravitational force equation in terms of density. Homework Equations F(Gravity) = ((GravitationalConstant)(Mass1)(Mass2))/radius^2 Density = mass/volume The Attempt at a Solution Based on the original equation for gravitational force, there are two masses...
11. ### Balancing Beam

OHHHH! The angle at which they're acting to the beam is 90 degrees. Sin of 90 degrees is 1, which means I simply need to set them equal to something since the beam isn't moving. Isn't the net torque if the beam is balanced 0? If that was the case, I would get the answer that the radius equals...
12. ### Balancing Beam

Oh, I see what you're saying. The upward force is 300N, coming from the fulcrum. The downward force also has to be 300N, coming from the weights of both m1 and m2. Since m1 is 20kg, I would multiply gravity (our professor has us use 10) by 20. That would give me a force of 200N. Which means that...
13. ### Moment of Inertia Ratio

Awesome! Thank you so much for the help, as always, Tom! :D
14. ### Moment of Inertia Ratio

I guess, yeah. I just always type exactly what my professor sends us. :/ and would the ratio change at all then? Since it remained at 5m? The equation for the disk would remain the same at 1/2mr^2, but the equation for the single point mass would also remain at mr^2...right?
15. ### Moment of Inertia Ratio

Well, since I still don't have a specific mass, I may have to put it in terms of m, leaving m as a variable...but at the same time, would the radius become zero, since all mass is concentrated at one point instead of people spread across it? I'm attempting to visualize it, and I'm seeing a...