You throw a ball vertically upward from the roof of a buildi…

You throw a ball vertically upward from the roof of a building.  The ball leaves your hand at even with the roof railing with an upward speed of [v0] m/s; the ball is then in free fall. On the way back down, it just misses the railing and hits the ground [t] s after it leavs your hand.  How tall is the building?

You have left your career in nursing and are working at a dr…

You have left your career in nursing and are working at a drug company that is developing a novel drug treatment for Parkinson’s Disease. The drug in question is highly selective for the desired dopamine receptor and can be given as a subcutaneous injection daily. In preclinical trials using animal models, the ED50 and LD50 were determined to be 8mg/day and 10 mg/day, respectively. While it is incredibly expensive to produce, it elicits minimal side effects in most patients. The most important reason that the company is not moving forward with clinical trials is that the drug: