Vardaan Learning Institute

A bird flies back and forth between two trains moving towards each other at $20 \text{ km/h}$ and $30 \text{ km/h}$ separated initially by $100 \text{ km}$. If the bird's speed is $60 \text{ km/h}$, find the total distance flown by the bird before the trains collide.

A car moves along a straight line such that $v^2 = 100 - 4x$. Find its acceleration and displacement when $v = 0$.