Recent content by Nm

Does anyone know? I found the frequency, but I'm a bit confused about why amplitude is in Pascals and how I would find the intensity.

Can someone tell me how to find the intensity given only the wavelength in meters and amplitude in Pascals? Thanks.

Thanks for your help. I have another question: When the pinball is at a certain distance above its initial location (on the way up), how would I find its speed? Do I set KE = PE of the spring?

Let's say I have a pinball (solid sphere) with a given mass and radius, and it is held back at a certain distance from equilibrium on a spring. The spring constant k is given, and the ball is then fired onto the pinball machine surface, which is tilted. How would I find the maximum height the...

If the weight is mg, the angular acceleration would be 9.8m/s^2/(2kg)(0.75m)?

I used that relationship to get inertia of a point mass to equal mr^2 and the net torque to equal rFsin90. From the two equations I got angular acceleration to equal F/mr. Am I really far off because I don't know the force...?

Two masses (mA= 2 kg, mB= 4 kg) are attached to a (massless) meter stick, at the 0 and 75 cm marks. The system is then hung from a string, so that it stays horizontal. Now, if mass B was removed, and no additional force was supplied, calculate the size of the angular acceleration of the meter...

Friction is a non-conservative force because it can convert mechanical energy such as kinetic energy into non-mechanical energy (heat).

For problem 1, first find the rotational inertia of the door (includes all 4 panes). Then, you can use the torque formula to find the angular acceleration. Remember the force is perpendicular to the pane.

Does anyone have any suggestions? Thanks.

I figured out the solutions so never mind.

To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 3.90 m apart. http://forums.cramster.com/answer-board/image/b34f433113a2369128cc61ed29304ffd.jpg If the left scale reads 250 N, and the right scale reads 106 N, find the...

A rotating door is made from four rectangular glass panes, as shown in the drawing. The mass of each pane is 76 kg. A person pushes on the outer edge of one pane with a force of F = 55 N that is directed perpendicular to the pane. a.) Find the rotational inertia of the door. b.) Find the...