# A moving wall

A ball is thrown with initial velocity 10 m/s at an angle of $$60^\circ$$ to the horizontal. It strikes a vertical wall moving toward it with a velocity of $$10\text{ m/s}$$ and bounces (elastically) to the point from where it was thrown.

Determine the time $$t$$ (in seconds) from beginning of motion to the time that it strikes the wall.

Assumptions and Details

• $$g=\SI[per-mode=symbol]{9.81}{\meter\per\second\squared}.$$
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