1. A stone is thrown vertically upward from the ground and just reaches the top of a building 100m high. At the same instant that the stone is thrown from the ground a ball is dropped from rest at the top of the building. At what height do the stone and the ball pass one another. (answer: 75m above ground)
Is this velocity actually given? Do I only state a given velocity of 0m/s if "rest" or "stationary" is mentioned?
ball and stone meet = ?
Solve for time first.
Determine the height at which they meet.
Verify with stone equation
Sub ball equation into stone equation
What do I do next? I think I've made an error with the given 's, but I'm not sure how.