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Physics Exam 2

# Physics Exam 2 - Common Exam 2 Physics 111 Fall 2006 Name A...

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Common Exam 2 Physics 111 Fall 2006 Name _____________________________ A Page 1 Total Number of Points is 15 (Multiple Choice and Workout Problems). Multiple Choice Problems are 1 Point per Question. 1.) A toy car moving at constant speed completes one lap around a circular track (a distance of 200 m) in 25.0 s. If the mass of the car is 1.50 kg, what is the magnitude of the force that keeps it in a circle? A) 0.48 N B) 1.51 N C) 3.02 N D) 12.0 N E) 96.0 N 2.) The coefficient of static friction is 0.800 between the soles of a sprinter s running shoes and the level track on which she is running. Determine the maximum acceleration that she can achieve. 3.) A sled of mass m is given a kick on a frozen pond. The kick imparts to it an initial speed v i = 2.00 m/s. The coefficient of kinetic friction between the sled and the ice is µ k = 0.100. Utilizing energy considerations, find the distance the sled moves before it stops. ± ² 2 2 2 / / 2 2 3.02 N l t v F ma m m r l l m t S S net, net, 2 0 7.84 m/s y y x x x s s x s F ma N mg F ma ma N mg a g P P P ³ ³ mec th th 2 2 2 2 0 0 1 1 1 0 2 2 2 2.04 m 2 f i k i k i k E E K E mv mv f d mv mgd v d g P P ' ´ ' ' ´ ' ³ ´

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Physics Exam 2 - Common Exam 2 Physics 111 Fall 2006 Name A...

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