Physics Exam 2

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

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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. A) 0.80 m/s 2 B) 7.84 m/s 2 C) 9.80 m/s 2 D) 12.3 m/s 2 E) 38.7 m/s 2 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. A) 0.20 m B) 0.98 m C) 2.04 m D) 4.08 m E) 20.0 m ± ² 2 2 2 / /2 2 3.02 N lt v Fm am m rl l m t S net, net, 2 0 7.84 m/s yy xx xs s a N m g F ma ma N mg ag PP P ³ ³ ´ ´ ³ mec th th 22 2 2 0 11 1 0 2 2.04 m 2 fi k i k i k EE K E mv mv f d mv mgd v d g ' ³ ' µ ' ³´ µ

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Common Exam 2 Physics 111 Fall 2006 Name _____________________________ A Page 2 4.) If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60 s, at constant speed, what average power is required of the force making the lift?
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This note was uploaded on 10/28/2010 for the course PHYS 111 taught by Professor Moro during the Fall '08 term at NJIT.

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

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