Recent content by Danya314

What I have done so far isn't wrong, it just isn't getting me the answer I need. Like I said, I can't isolate mass on one side of an equation without cancelling the term out.

Homework Statement Using the PhETLunar Lander applet, we are to find the mass of the lunar lander. We know the maximum acceleration of the module's engines and gravitational acceleration of the moon. Homework Equations F=ma mgh=1/2mv^2 f*t=p The Attempt at a Solution Everytime I try to...

What does vertical plane mean? I drew a picture, but I don't understand how the launch site and hoops be in the same vertical plane and be different horizontal distances from each other.

Homework Statement The problem states a situtation where two hoops, their centers, and a launch site are all in the same vertical plane. The objective is to launch a tennis ball into both hoops from the launch site. What does it means when it says "vertical plane"? The launch site is not...

Homework Statement An instrument is producing a tone, such as a D4. If I know the frequency of the tone, the length of the instrument but nothing else, how can I find the harmonic at which the tone is produced? The instrument is an open tube. Homework Equations v=wavelength*frequency[/B]...

If friction was ignored, then I would assume the the net force would pull the block down the incline and strech the spring.

So in this case, would it point down the incline?

So, which is it?

Homework Statement A mass is at rest on a spring on an inclined plane. Which way would I draw the force of friction on a force diagram? Homework Equations Fnet=0 F=-kx The Attempt at a Solution It could point either up the incline, or down the incline. [/B]

I have it now. Thank you very much.

Would gravitational potential energy still be zero if I define xe to be 0?

Thanks for the help. But why wouldn't x be amplitude at the bottom?

Homework Statement The problem is to use conservation of energy to determine the equation for the velocity at the equilibrium position of an oscillating mass on a vertical spring. The question says to use three types of energy. The question gives the equation, the problem is to solve for it...

Hello all, I am currently a tenth grader. I want to know how important the college you go to is. Is it true that to excel in physics you have to go to the top ten? Or is it what you do at college that is important? Thank you in advance.

Every science competition for the last three I have done were at regional levels and I have gotten within the top three as well as extra awards such as Naval Science Award. I have done a regional math competition where I placed first in my county. Should I look into the national and...