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ex1-phy1025-sum11

# ex1-phy1025-sum11 - Name EXAM 1 Physics 1025 14 June 2011...

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Name______________________ EXAM 1 – Physics 1025 - 14 June 2011 Calculators are NOT permitted. Remove all items from desk. See formula sheet on Page 5 1 1. (20 pts.) Harry wants to be a punter on the football team so he uses a very precise stop watch to calculate his hang time. While practicing in an alleyway however, the ball hits the edge of the roof of an adjacent building. Nonetheless, he has the wherewithal to stop the stop watch at the moment that the ball reaches its maximum height. The stopwatch says 3.0 seconds. He then measures the height of the building (where the ball hits) and finds it to be 25.0 meters high. He finds the horizontal displacement (from where he kicks) to the edge of the building to be 10.0 meters (in the x-direction). Assume that the ball is kicked from ground level and that g = 10.0m/s 2 . (Remember to use negative and positive values to indicate direction.) A. What is the initial vertical velocity ( 𝑣 o 𝑦 ) of the football when it leaves Harry’s foot?

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