# Not Motion Again!

Classical Mechanics Level 3

From the top of a 100 m tower, a ball is dropped and at the same time another ball is projected upwards from the ground with a velocity of 25 m/s. Find when (in seconds) and where the two balls meet (distance measured from the ground in m).

Let the time at which they meet be $$t$$ seconds and the place where the balls meet be $$d$$ meters. Find $$d + t$$

Assumptions and Details

• The distance $$d$$ is measured relative to the ground.
• $$g = 9.8 ms^{-2}$$
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