Recent content by ileacus

Here's your problem: T3 - (-T3) ≠ 0 T3 - (-T3) = T3 + T3 Try adding the above equations instead of subtracting. BTW, you actually don't need to find a numerical value for the acceleration. You can rearrange the second derived equation (the one you get by adding the above equations) to get an...

I figure I might as well complete this and show the solution if anyone else is interested. First, get the rocket equation as a function of time, and then integrate that. V = delta-V Ve = exhaust velocity mdot = mass flow rate M0 = initial total mass including propellant M = mass...

Right, of course. I thought about that originally, but didn't see a way to integrate wrt time. I forgot that the mass ratio is a function of time (duh). It's a nasty looking integral, but I think I've got it. Thanks!

This is the homework forum. I originally posted this in the general physics forum, but it was edited and moved by one of the moderators. Any chance you could help with the answer?

I am hesitant to mention this, because when I follow this method, I arrive at a different answer than the given book answer. That said, I would analyze it like so: Each sphere is repelled by an electric force that is sufficient to balance the gravitational force when the sphere is deflected 5...

An ideal voltmeter "sucks out" zero current. Its infinite resistance would prevent any current from flowing through it, and it would measure an exact voltage difference (potential) between its two leads. Because a real world voltmeter cannot have infinite resistance, some of the current "leaks"...

For 2) the (frictional) force exerted by the floor is given independent of the angle of the rope. The force the worker applies on the rope is given at an angle to the floor. Only part of the force the worker is exerting is used to move the box horizontally. What fraction of the worker's total...

Your problem statement is either missing some information or requires some assumptions. If you assume that the receiver catches the ball at exactly the same height that the quarterback released it, and if you take that height to be 0, then this is solvable. The displacement in this case is...

No one seems particularly interested in answering this. Perhaps if I restate the problem more formally? Consider a rocket in space with the following characteristics: total mass (including propellant): M0 = 30000 kg propellant mass: Mp = 24000 kg exhaust velocity: ve = 5000 m/s thrust...

I'm trying to solve a rocket problem and have found no clear answer on how to do this. If I have a rocket in space (no significant gravitational forces, no drag, etc.) with a known constant thrust (T), mass flow rate (mdot), exhaust velocity (Ve), total initial mass including propellant (Mi)...