# 1)A particle is dropped from the top of the tower of height h. At the same instant another particle is projected vertically upwards from the bottom of the tower with such a velocity that it will be able to just reach the top of the tower. When and at what height from ground the two particles meet?

Sumit Majumdar IIT Delhi
7 years ago
Let both the particles meet after time t.
Hence,
The distance covered by the particle coming down from the top of the tower, would be equal to:

The distance covered by the particle going from ground would be given by:

so, the time taken by both to meet, would be given by:

So the height from the ground would be equal to: