Stones being dropped and thrown from building

atbruick

1. The problem statement, all variables and given/known data
A stone is dropped from the roof of a building; 1.90 s after that, a second stone is thrown straight down with an initial speed of 29.0 m/s, and the two stones land at the same time.
a. How long did it take the first stone to reach the ground?

b. How high is the building?

c. What are the speeds of the two stones just before they hit the ground?


2. Relevant equations



3. The attempt at a solution

lewando

To save time, and to be polite, Physics Forums should define something like: "Standard Response 001" being something like "Welcome to PF. Please observe the PF rules for posting, then we'd be happy to help."