Recent content by wayfarer

Homework Statement A sinusoidal transverse wave travels on a string. The string has length 7.60 m and mass 6.50 g. The wave speed is 34.0 m/s and the wavelength is 0.250 m. If the wave is to have an average power of 55.0 W, what must be the amplitude of the wave? Homework Equations...

In that case, how would I deal with a situation where F is not constant? I have only learned so far how to deal with cases where it is constant.

Homework Statement A uniform rope of length L and negligible stiffness hangs from a solid fixture in the ceiling The free lower end of the rope is struck sharply at time t=0. What is the time t it takes the resulting wave on the rope to travel to the ceiling, be reflected, and return to the...

I know that but I meant, I am not sure which formula is applicable here. I thought first that we could use formula: A = sqrt ( x_0 ^2 + (v_0x)^2/w^2 ) but it seems like v_0x = 0, so this formula doesn't seem to help much (it seems to give wrong answer in this situation). Perhaps Hooke's Law, F...

Dear Doc Al, I think I understand my mistake - that I took the stretched length of the spring, and not its unstretched length now. But I am still a bit confused, and don't understand how to relate the two together - could you please tell me how I could do that?

Homework Statement An apple weighs 1.11 N. When you hang it from the end of a long spring of force constant 1.53 N/m and negligible mass, it bounces up and down in SHM. If you stop the bouncing and let the apple swing from side to side through a small angle, the frequency of this simple...

I was wondering is someone could help me with the following problems: 1. Two children are trying to shoot a marble of mass m into a small box using a spring-loaded gun that is fixed on a table and shoots horizontally from the edge of the table. View Figure The edge of the table is a height...