Recent content by anti404

so basically, m(slope)=1/μf², or f(experimental)=\sqrt{1/mu*m} if so(and even if not), awesome, guys! thanks a lot. =]

so fλ=√(T/μ), or λ^2=(T/μ)*1/f?.. does that mean the slope of the line=1/f? sorry, I still don't really understand this... =/.

hi, in our lab last Thursday we were doing standing waves on a string attached to a pulley and vibrator(at f=120Hz), and we produced loops by creating a tension force in the string. by calculating the wavelength(2*[distance from node to node]/#of loops), and the tension force(mass added to the...

okay, so the mass of the spring etc. isn't used, and mg/x=K=4.49N/m. then to find the period of oscillation when ALL masses are attached, T=2pi[sqroot(m/k)]. now when it says all the masses are attached, would you still not include the spring? I'm confused because it says something about...

Homework Statement A mass attached to a holder hangs from a spring. the combined mass of the hanger, spring, and mass=45g. Adding mass of 55g stretches the spring 12cm. What is the spring constant? Homework Equations Hooke's Law F=kx The Attempt at a Solution (m1+m2)g/x=k...

for our lab last Thursday, we inclined a plane at 5deg, and rolled down two objects, a solid disk and a hollow cylinder, and recorded their position in time with a ultrasonic sensor and the helpful World in Motion software. with this we calculated the object's velocity at certain intervals in...

ah, okay, I think I get what you are both saying. we've never talked about the movement along an angle[our teacher likes to assign problems that cover more than we have currently learned; consequently, I always have trouble on the homework, but not the quizzes/exams...], or anything like the...

although I have no idea as to what you meant by this, it worked. haha. thank you both. =]

well, we have to find the angular speed, and I think that's where we will use the length of the string(maybe?). uh, I guess I don't really understand "get the total angle by integrating twice". I cannot say we've ever actually mentioned integrating in my physics class[it's a non calculus...

Homework Statement A mass attached to a 48.9 cm long string starts from rest and is rotated 31 times in 78.0 s before reaching a final angular speed. Determine the angular acceleration of the mass, assuming that it is constant. Homework Equations honestly, this is my first problem. I figure...

the calculated KE before the collision was around 8.58*10^-3J. KE after was about 5.97*10^3J. so it lost, approximately. 2.5*10^-3J of energy following the collision. I may have done the calculations incorrectly, but the more plausible situation is that my derived equations may be incorrect...

as alluded to in the title, this isn't so much a "problem" as a concept for a lab/experiment we performed. so, for some reason I was sure that a collision between two hockey pucks of roughly equal masses would result in an elastic collision, but I calculated the KE, and the two values were...

ah, okay. for whatever reason I kept getting cos/sin, which confused me. thanks!

this is what I kept trying to do, but I don't know how to solve for v2' since you're missing angle theta. because what I'd get was m1v1'sin(alpha)/sin(theta)=v2'. and I don't know how to solve from that point on. Lachlan1: would that mean that you'd just add 90deg to alpha and you'd get theta...?

Homework Statement a ball of mass 2kg is traveling North with a Velocity 6m/s when it collides with an identical, stationary ball. after the collision, one of the ball moves with a velocity of 2m/s at an angle of 30deg east of north. find Velocity of the other ball. m1=2kg m2=m1 v1=6m/s...