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circular motion Refer to problem 5 in section A on this page: http://www.physics247.com/solved_problems/circular_motion.php

I agree with cyclovenom and lightgrav. See question 23 on http://www.physics247.com/members/physics40/015.php

Some of the books here may be what you are looking for: http://www.physics247.com/store There is no short cut. You have to work with ideas to learn them.

diagram of charges I am picturing something along these lines: http://www.physics247.com/members/advanced/gaussian_surfaces.php

In this situation there is neither a shell by itself, or a solid by itself.

For example: http://www.physics247.com/motionquicklessons/0004.shtml

Its not the fall that hurts the egg; its the sudden stop. Consider ways to increase the interval of impact. A slow change in momentum is associated with a smaller force.

So ummmm ... This is relative kinetic energy not average kinetic energy? That is, relative to the kinetic energy of the object when v0 = 0 Interesting derivation. Thanks.

The gravitational forces are actually 0.4kg X 9.8 N/ kg = 3.92 N and 0.5 kg x 9.8 N/kg = 4.9 N . The net force , F1, acting on the 0.5 kg mass is F1 = 4.9 - T where T is the tension on the string. The net force, F2, acting on the .4 kg mass is F2 = T - 3.92 N The acceleration of the...

In that case, they are both moving in a straight line, and at t = infinity they would be an infinite distance apart. Not much of a problem.

Apparently the speed of B is constant and its direction is changing as A moves. This is indeed acceleration. Similarly, the magnitude of velocity of A is constant (ie speed is constant) but its direction is changing.

[/B] The way I interpret this question is as follows: By the structure of the subquestions 3 and 4, we are being lead to believe that A continues upward to some point at which it is stationary. Conservation of momentum (specifically, collision with coupling) can be used here to...

I am confused, too. Are you sure you have been given the mass of the spring; or is it a mass hanging from a spring. The latter is the usual type of problem dealing with idealized springs. Look up period of harmonic motion in your text. You will find T = 2<pi>(m/k)^(1/2) Feel free to...

Induction is causing or forcing something to happen. Electromagnetic induction refers to an electric current forced to flow through a conductor when the conductor or field "move" relative to each other, as in the case of an electric generator. Actual movement is not required if flux changes...

___ 2. If your car can generate electricity 12 v AC at 50 amps and you decide to supply power to your home during a storm outage. Please design a transformer to convert electricity to 120 v AC. Your primary coil has 100 turns. What is the potential output from the transfer? ___ Are you being...