How can you tell whether light is polarized?
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I assume that the ball is stationary (v=0) at point B, so its total energy is just potential energy, and it is equal to 7.35 J.
At point A, all this energy has converted into kinetic energy, which is:
And since K=7.35 J, we can find the velocity, v:
At point A, all this energy has converted into kinetic energy, which is:
And since K=7.35 J, we can find the velocity, v: