This isn't a homework question but if it belongs in another thread please tell me so I can switch it.
I was just wondering if there is an "agreed-upon" speed that an electron would travel in say a vacuum? I understand that one can continue adding energy until the electron reaches very nearly...
If you think of it from the point of view of the kid's hands then there is some motion to the kid. He doesn't just catch it with his hands and they (his hands) stay still, rather they move back a certain distance, albeit a relatively small distance. So yes, the ball does do work on the kid...
displacement = x(final)-x(initial)
s = 0-132
When you used 52 m/s (which was your initial velocity) for your motion equation, you get an initial position.
Did you use a positive acceleration or a negative acceleration? Always remember which way you set up your coordinate system (i.e. down is negative and up is positive.) If you used (-8)m/s for the velocity than we assume down is negative.
"Find the displacement of the ball."
Since you throw the ball straight up and it comes back down to where you initially threw it from, then I believe the displacement should be zero. It would be like running a lap around the track. Sure you have ran a 1/4 of a mile but your total displacement...
Homework Statement
At t=0, a grinding wheel has omega=24.0rad/s, alpha=30.0rad/s^2 until a circuit breaker trips at t=2s. From then on it turns through 432rad as it coasts to a stop at constant alpha.
a) through what total angle did the wheel turn between t=0 and the time it stopped?
b) what...
set bernoulli's equation equal to zero and solve for v. Now since this is an ideal fluid the velocity of fluid flowing through point a, 1.84m, is going to be equal to the velocity of fluid through point b, 0.45m. So you then use the equation for volume flow rate which is
dV/dt= A1v1= A2v2, where...
http://www.intmath.com/
This is an excellent site for what you're looking for...just scroll down to "Higher Calculus" and you should see "Fourier Series."
"No, we will not just skip checking posts"
You misunderstood me here, I was referring to the smug comments that could be done without. You said you saw the thread and just decided to not enter it. Everyone who feels there time will be wasted shouldn't enter it, but you must remember that there...
"I think that there is a "Banned Topics" list someplace here, with explanations for why they are banned as non-useful topics. Maybe we need to work more at expanding that list as a FAQ for newbie posters..."
perhaps..or create a section where hypotheticals can be freely asked...
All I'm trying to get at is that it should be fine to talk about almost anything as long as it is in the correct thread of course. You said:"Boy, that's an unproductive thread. Not a possibility from the get-go, so why waste time on it instead of on something real and potentially productive."...