Quadratic Mechanics

A ball is thrown vertically upwards with a velocity of 2 m/s.\SI[per-mode=symbol]{2}{\meter\per\second}. It is seen at height hh twice.

Find the sum of the times, measured in seconds from the moment the ball is thrown, at which it is seen at height hh.

Details and Assumptions:

  • Take g=10 m/s2g=\SI[per-mode=symbol]{10}{\meter\per\second\squared}.
  • Neglect air resistance.

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