Homework Statement
Prove the following useful fact: the least-squares fit for a line through any set of points (x_1,y_1) ...,(x_N, y_N) always passes through the "center of gravity" (x-bar, y-bar) of the points, where the bar denotes the average of the N values concerned. [Hint: you know...
Okay, that is what I was stuck on; L. I know L is measured on the surface of the planet, like arclength, and s = rtheta. But I don't know if I can get the r from that since we don't have theta?
for the apparent weight, do we use w=Gm_Em/r^2 ?
I am having trouble with the first portion of the problem too. Do you think you could lead me in the right direction, Peach? Are you supposed to change L into some form of r, or is L = r?
I'm not quite sure what to do. Any help would be great. Thanks in advance.
Homework Statement
Compact Disc. A compact disc (CD) stores music in a coded pattern of tiny pits 10^-7 m deep. The pits are arranged in a track that spirals outward toward the rim of the disc; the inner and outer radii of this spiral are 25.0 mm and 58.0 mm, respectively. As the disc spins...
Yes, it appears that it is starting from rest. How would I go about finding the mass ratio? Also, the log equation?
How do I go about finding the mass of the rocket? (is that even the right question to ask)
It doesn't say that it has to be which i would assume it shouldn't be. All I know about the question is what you see. So to answer your question, i don't know. I was hoping someone would be able to answer that lol.
Homework Statement
A single-stage rocket is fired from rest from a deep-space platform, where gravity is negligible.
If the rocket burns its fuel in a time of 50.0 s and the relative speed of the exhaust gas is v_ex=2100 m/s, what must the mass ratio m_{0}/m be for a final speed v of 8.00 km/s...
is there possibly a different way to write the solution? I've thought about this problem ALOT and although the answer is right, i know I'm missing something stupid.
No need to feel dumb, it took me HELLA long to figure that out lol. It wasn't until my boyfriend pointed that out that I realized what it was ha ha. I always forget not to overlook the obvious things in focus on the complexity
If the car starts at height h = 60.0 m and the radius is R = 15.0 m, compute the tangential acceleration of the passengers when the car is at point C, which is at the end of a horizontal diameter.
Take the free fall acceleration to be g = 9.80 m/s^2.
That is my question.
The Tangential...
Ok, what is the exact definition of Tangential Acceleration?
I spent about an hour researching to see if I could find an formula and I found one but when I found the answer I realized it was right under my nose the whole time.
*hint: You didn't post all the information in the problem. The...
Homework Statement
A 2.00-kg package is released on a 53.1 ^\circ incline, 4.00 m from a long spring with force constant 120 N/m that is attached at the bottom of the incline View Figure . The coefficients of friction between the package and the incline are \mu_{s} \;=\; 0.40 and \mu_{k}...
Homework Statement
If the car starts at height h = 60.0 m and the radius is R = 15.0 m, compute the tangential acceleration of the passengers when the car is at point C, which is at the end of a horizontal diameter.
Take the free fall acceleration to be g = 9.80 m/s^2.
Homework Equations...
it's late lol, soo my mind is working in funky mode. while waiting I did part a lol. Going to do part D now, but might get back to it tomorrow. tired x_x
Hey, how did you get Part A? I have managed to get the other parts except for the Tangential Acc part but I'm working on it and making sure my calculations are right. When i get it i'll tell you how I got it but can you help me with the first part?
49.39 is what I got using this calculation:
U1 + K1 = U2 + K2, but since K1 and K2 = 0, U1 = U2, being that [U1] 1/2kx^2 = [U2] mgh, so; 1/2 (400n/m)(.22m)^2 = 2(9.8m/s^2)h
968. = 19.6h
h = 49.39 m
So find the E first and that'll tell me the distance right? Should I just plug in a distance to reference when the block stops?
I apologize for sounding reallllly stupid or thick-headed, I've been studying allllll day and am kind of having a brain fart.
Basically, without telling me the...
HAHAHA, yah...sorry.:rofl:
The first part of the question asked how fast was the block moving and I got 3.11 m/s. The second is wondering how far it went up the incline.
Homework Statement
A 2.00-kg block is pushed against a spring with negligible mass and force constant k = 400 N/m, compressing it 0.220 m. When the block is released, it moves along a frictionless, horizontal surface and then up a frictionless incline with slope 37 degrees
Homework...