PHYS-1100 Fall 2009 Exam 2 answer key

PHYS-1100 Fall 2009 Exam 2 answer key - 1. During a...

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1. During a Triathalon, an athlete first swims 800 m in 14 minutes, then bicycles 12 km at an average speed of 19 km/hr, and finally completes a 5 km run in 26 minutes. What is the athlete's approximate average speed for the whole event? a) 11.3 km/hr b) 12.6 km/hr *(6) c) 13.7 km/hr d) 15.2 km/hr e) none of these are even approximately correct 2. In the absence of air resistance, a football dropped from the top of the Memorial Tower near the Parade Grounds would strike the pavement below about 3.3 seconds later. Approximately how tall is the Memorial Tower? a) 67 m *(6) b) 53 m c) 44 m d) 36 m e) none of these are even approximately correct 3. A particle is moving in a straight line and is getting slower. What can correctly be inferred from this information? a) the particle's acceleration is positive b) the particle's acceleration is negative c) the particle's acceleration is in the same direction as its velocity *(6) d) the particle's acceleration is in the opposite direction as its velocity e) not enough information is given to be sure
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x t x t x t x t x t 4. A ball was thrown vertically downward from the roof of a tall building. Later, an identical ball was thrown vertically upward, with the same speed, and from the same spot as the first ball. Which of the following are true
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This note was uploaded on 06/07/2011 for the course PHYS 1100 taught by Professor Giomanico during the Spring '08 term at LSU.

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PHYS-1100 Fall 2009 Exam 2 answer key - 1. During a...

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