/sci/ - Science & Math

>>11711419
Total energy at the start is (mv^2)/2. Total energy at the bottom is (kinetic energy at the bottom, 0)+(gravitational potential energy lossed)+(potential energy stored in spring). Equate these two things and rearrange to get [eqn] \frac{1}{2}kx^2-mg\sin\theta x-mg\sin\theta d-\frac{1}{2}mv^2=0 [/eqn]
so you literally apply the quadratic formula.

>>11617814
Dear leader is still with us.
>>11628501
>"becomes"
nothing is becoming anything. look up the definition of a limit.
>>11629810
There is no formula, in general. Use Maxwell's equations.
>>11630367
>volts per meter
So, electric field. You right-cross-multiply it with magnetic flux density.
https://en.wikipedia.org/wiki/Poynting_vector