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HNQ
12:38 AM
2
Q: After how many bounces will a ball's mechanical energy equal zero?

jazzblasterThis was a question I asked myself for fun. It turned out to be more difficult than I initially imagined. The Problem: Let's say a ball is dropped from h0. Air friction is negligible. The collisions between the ball and ground are inelastic, so mechanical energy is not conserved. After how many...

 
 
1 hour later…
HNQ
1:41 AM
1
Q: Confusion with treatment of unit vectors in electrostatics

JoaI am reading Griffiths’ Introduction to Electodynamics and there are two problems where the methodology for treating unit vectors in integrals seems inconsistent to me. When we are trying to find the electric field $\mathbf{E}$ at some point $P$ around a static line charge with a uniform charge p...

 
 
6 hours later…
HNQ
7:43 AM
1
Q: If you're holding on to a playground spinning wheel and then let go, is your trajectory straight or curved?

scmLet's say you are on one of those playground spinning wheels and then you let go. I've heard that you will fly off tangentially to the wheel, but do you really fly off in a straight line, since you must have some angular momentum? Or do you fly in a straight line, but spin on your own axis? Ignor...

 

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