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After how many bounces will a ball's mechanical energy equal zero?

Never, if you treat the problem with the laws of classical mechanics, treat both the ball and the ground as "macroscopically" rigid, and you don't set a threshold $\overline{h}$ under which ...
• 10.6k

Noether's theorem by a taste of logic

Noetherâ€™s theorem is a mathematical theorem. It connects conservation laws to the properties of Lagrangian functionals. If these properties are contradicted by experiment then this means that a ...
• 25.3k

After how many bounces will a ball's mechanical energy equal zero?

First approximation: ball and surface are perfectly rigid. This implies the collision is instantaneous, and therefore elastic. The bounce height is always the same. Second approximation: ball and ...
• 426

Do bodies stick together after an inelastic oblique collision?

Do bodies stick together after an inelastic oblique collision? If the collision is perfectly inelastic, yes. If coefficient of restitution is zero it should mean that after collision the relative ...
• 73.5k
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Alternative way to compute expectation value of momentum?

Yes, you can work out the expectation value of an operator in that way. The key thing to notice is that the expectation value does not depend on which basis you choose to work with. For example, it ...