Your big brother, despite warning, drops a penny off the observation deck of the Empire State Building in New York City. The observation deck is 381 m above the ground. What isthe terminal velocity of the penny? How far has the penny fallen after 3 seconds?

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f