Recent content by Kristenx2

Oh wow thank you for noticing that, now I am really glad I had someone check! Thank you for your help, you're right that I should have done L=λ/4. I was reading the equation wrong, and the one I was given claimed L was wavelength and entirely ignored lambda, so shame on them.

Here is a tricky one (for me) that uses linear mass density and two masses. I don't really know which to do so I did both! Homework Statement An object can be hung from a string (with linear mass density μ=0.00200kg/m) that passes over a light pulley. The string is connected to a...

Hi everyone, just me doing my regular Thursday Physics homework and looking for someone to check my work. Homework Statement A tuning fork with a frequency of f=528Hz is placed near the top of a tube. The water level is lowered so that the length L slowly increases from an initial value of...

For the angular acceleration of the pulley {alpha} I did R2*T2-R1*T1=I{alpha} and got 105.2 where R=0.05m and I used 102 and 49.4 for my Ts, and 1.94m/s2 for my acceleration. However, when I use {alpha}=a/R, using the same values, I end up with 38.8rad/s2... Which one? ;c

Oh! I am doing it backwards. You said T-Fμ=26a, right? So I was actually wrong about (26)(9.81)(0.2)-T=(26)(1.92) and I will not get a low or negative number.

So my linear acceleration really is 1.92m/s2? It just seems strange because when I plug that into (26)(9.81)(0.2)-T=(26)(1.92) I get an obviously ridiculous number, and for the other tension, (13)(9.81)-T=(13)(1.92) I get 102N.

Hi, grzz. Sounds good. Does that mean when I go to find the linear acceleration I would use m2g-m2a-m1gμ-m1a = 1/2mpa?

Homework Statement Consider 2 masses (m1=13kg, m2=26kg) connected by a string. The pulley is a uniform disc of radius R=0.05m and mass m=1kg. μ between the horizontal surface and the larger mass is 0.2. Find Frictional force acting on larger mass. Find the linear acceleration of the...

Homework Statement A rifle bullet with a mass of 15.5 g traveling toward the right at 262 m/s strikes a large bag of sand and penetrates it to a depth of 24.2 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet. Homework Equations F⃗...

Homework Statement You are traveling in a car going at a constant speed of 100 km/hr down a long, straight highway. You pass another car going in the same direction which is traveling at a constant speed of 80 km/hr. As measured from your car’s reference frame this other car is traveling at...

Homework Statement You apply a 2 Newton force to a 0.5 kilogram cart on a track and measure the acceleration of the cart with a motion detector. The acceleration is measured t be equal to 3.5 meters/sec2. Calculate the frictional force. In which direction compared to the applied force is it...