It seems I can't post the picture because it's from a site that has to be logged into. Basically, to the left is an incline on which the block starts. The length of the incline is the s1 listed. Then at the bottom of the incline the path levels off and the length of the level part is s2. The...
Homework Statement
http://nplq1.phyast.pitt.edu/res/msu/physicslib/msuphysicslib/13_EnergyConservation/graphics/prob27a_MechEnWFriction.gif
When mass M is at the position shown, it is sliding down the inclined part of a slide at a speed of 2.07 m/s. The mass stops a distance S2 = 1.9 m...
Ah! I just got it right. I was using the wrong directiond for my sums. For the x sum on M1, I assumed right to be positive and for the y sum on Mw I assumed up to be positive. This doesn't work because I need to assume that the pulley only changes the direction, and therefore the downward...
Yes, I realize that the ension will be equal in both cases...that's what I was trying to account for but I'm not quite sure how to account for it. Like I said, I solved for T in the hanging mass and used that in for T in the first mass...wouldn't that be assuming they are equal?
Homework Statement
http://nplq1.phyast.pitt.edu/res/msu/physicslib/msuphysicslib/09_Force_and_Motion/graphics/prob69_2blkplly.gif
Two blocks are arranged as shown. The pulley can be considered to be massless, and friction is negligible. M1 is four times more massive than M2.
If the...
Thanks...I ended up getting the correct answers. Here's what I did:
I set the first derivative of the equation you gave (which is essentially the basic formula v=v_0+at to zero to find at which time the maximum x would occur. Then I found the x and y velocity using that same formula but...
Thank you both, I will try and use your advice to try and solve the problem. I don't understand the integration though...what exactly would I integrate to get the velocity? Velocity is the derivative of position with respect to time, so would the velocity be the integral of acceleration with...
Homework Statement
A particle leaves the origin with an initial velocity v = 3.92i , in m/s. It experiences a constant acceleration
a = -1.00i -0.80j , in m/s2. What is the velocity of the particle when it reaches its maximum x coordinate?
i-component of velocity?
j-component of the...
Right, I get that now. The integral would be evaluated from +x to infinity. Could someone point me to a place, or perhaps explain to me briefly, how substituting an infinity into an expression would affect it? I know that if infinity is ever in the denominator then the expression would be 0. Are...
Homework Statement
A line of charge starts at x=+x_0 and extends to positive infinity. If the linear charge density is \lambda=\frac{\lambda_0x_0}{x}, determine the electric field at the origin.
The Attempt at a Solution
I'm really not sire which equations I would have to use to solve...
Wow, thanks! That all pretty much makes perfect sense to me...I just get a little lost in the last line when I need to add the fractions. Could you tell me how exactly the top line would combine so as to make the 2h appear? Thank you so much for your help.
Yes, I see what you mean. But now I get that the density is \frac{3\pi}{GT^2R^2}(R+h)^3
So I have another R62 in the bottom there...is there a way I can bring that up and unclude it in the R+h ?
[SOLVED] Density of a planet using orbit of a satellite
Homework Statement
A satellite is in a circular orbit about a planet of radius R. If the altitude of the satellite is h and its period is T, show that the density of the planet is \rho=\frac{3\pi}{GT^2}(1+\frac{h}{R})^3
The...
[SOLVED] Energy required to place a satellite in orbit
Homework Statement
A 200-kg satellite is placed in Earth orbit 200 km above the surface. What is the minimum energy necessary to place this satellite in orbit (assuming no air friction)?
The Attempt at a Solution
To solve this...
In my book, it says that a=-\omega^2Acos(\omegat+\phi)
So if I put in 2*pi*f for w, I get
a=-4\pi^2f^2Acos(2ft\pi+\phi)
OK, thanks now I can see where those quantities come from. OK, so the frictional force must not be greater than an acceleration given by this, right? I think I'm...
I suppose that my two biggest things that I can't get straight in my mind are where does the pi come from, and why is there no k needed to find the answer. Also, there should be an exponent of 2 on the pi in the denominator, sorry about that.
Homework Statement
A large block P executes horizontal simple harmonic motion by sliding across a frictionless surface with a frequency f = 1.5 Hz. Block B rests on it, and the coefficient of static friction between the two is \mu_s=0.60. What maximum amplitude of oscillation can the system...