Recent content by krypt0nite

Diagram The answer is A and i don't really understand why that is so. I am thinking that since Emf - Ir= Vterminal. The current must go up but i am not sure exactly why is that happening. I've read through my handbook but can't seem to find anything on this type of problem.

and the answer is A=440kg right? thx

Net Torque CCW = Net Torque CW Mg(3m) = 470.4N(6m) I used the wheel as the fulcrum point. Mg= 940.8N

How do I do this problem? How do I start? Problem I drew all the Forces acting on the body and used Net Torque=0. I still can't find the right answer. So far none of my answers are close. I think my approach is wrong. Can someone give me any hints to help me solve it.

So ratio would be 1:2?

Wouldn't the "r" be different values so I don't think they can be 1:1? I was thinking more like 1:1/r ratio would make sense.

There are no values given to me so i don't know how to compute it

Calculate the ratio of the energy that would be required to put a mass M into orbit near the Earth's surface (if there were no friction) and the energy to put the same into distant space. I'm stuck. How am i suppose to calculate the ratio. I know the that the energy to put M into orbit near...

Which is larger - the total energy of the 2.00 kg satellite in its 160. km orbit or the total energy in its 144 km orbit. Explain why the two answers are different. Ok the total energy of 2.00 satellite in 160km orbit is -6.09x10^7 J and the total energy of 2.00 satellite in 144km orbit is...

Does Fnet=5.4N 35 degrees above horizontal sound right?

I don't know how to calculate the magnitude of the unbalanced force. A pendulum bob with a mass of 1.80 kg is displaced from its equilibrium position, A, to an unstable position, B, by means of a string which is kept horizontal. The force applied to the string is, F. The length of the...

Can someone help me explain this problem to me? I try a bunch of things and I dont' really know how to get the answer. An object starts from rest and slides down a frictionless track as shown. It leaves the track horizontally, striking the ground at a distance d as shown. The same object is now...

I need help on another question A ball of mass 3.0kg moving at a speed of 3.0ms has a head-on collision with a stationary ball of mass 4.0kg. If the collision were perfectly elastic what would be the speeds of the two balls after the collision? I used the momentum before=momentum after...

A steel ball of mass 10kg moves due east at 5.0m/s. It collides with a rubber ball of mass 5.0 kg moving at 10m/s due north. After the collision the steel ball moves at an angle of 60 degrees East of North with a speed of 4.0 m/s. If the collision were perfectly elastic what would be the...

1) What is the maximum acceleration a car can undergo on a level ground if the static coefficient of friction between the tires and the ground is 0.55? I have no idea on how to start this problem. It seems there is not enough information. 2) A city planner is working on the redesign of a...