Ok, well I've tried to work this out, but I'm basically just guessing at everything--I'm that clueless. I don't even see how knowing M will help me. I don't know what to do.
The problem:
Consider a spherical planet of uniform density \rho. The distance from the planet's center to its surface (i.e., the planet's radius) is R_{p}. An object is located a distance R from the center of the planet, where R\precR_{p} . (The object is located inside of the planet.)...
I am happy to report that I figured it out. I guess taking a break for awhile and coming back to it can do wonders. I re-read the section and took a stab at it:
\frac{m_{1}(0)+m_{2}(x)}{m_{1}+m_{2}}=2
Solved for x:
x=\frac{2(m_{1}+m_{2})}{m_{2}}
Plugged in values... got a result of...
The center of gravity of an irregular object of mass 4.50 g is shown in the figure. You need to move the center of gravity 2.00 cm to the left by gluing on a tiny 1.60-g mass, which will then be considered as part of the object. Where should you attach this additional mass? Express your answer...
A cube of mass M = 500 g and side length 30 mm is free to spin on an axis through the center of one face. A massless pulley on this axis has a diameter of 2r = 10 mm. A weight of m = 50 g is hung from a string wrapped around the pulley. The assembly is released from rest.
(a) Find the time...
I've spent several hours on this plugging in and manipulating the rotational kinematics equations but I still cannot figure out what to do. I'm sure it's something extremely obvious, but I can't seem to figure it out. So... any hint at all would be nice. Thanks.
A computer disk drive is turned on starting from rest and has constant angular acceleration.
If it took 0.410 s for the drive to make its second complete revolution, how long did it take to make the first complete revolution? What is its angular acceleration, in rad/s^2
I cannot find out...
If the two particles with equal masses m collide with elasticity E = 0.650 , what are the final velocities of the particles? Assume that particle 1 has initial velocity v and particle 2 is initially at rest.
Give the velocity v_{1} of particle 1 and the velocity v_{2} of particle 2. Express...
I couldn't quite follow your post, but I believe I have a solution now. Thanks.
P=\vec{F}\cdot\vec{v}
I'm given v=2.1\ m/s
I need to find F which I do by using Newton's 2nd law:
\Sigma F_{y}=-mg+L=0 where L is the lifting force.
So
L=mg
m=680\ kg
g=9.8\ m/s^{2}...
When its engine of power 80 kW is generating full power, a small single-engine airplane with mass 680 kg gains altitude at a rate of 2.1 m/s.
What fraction of the engine power is being used to make the airplane climb? (The remainder is used to overcome the effects of air resistance and of...