2010s_f

# 2010s_f - Physics 2101, FINAL EXAM Spring 2010 May 11, 2010...

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Physics 2101, FINAL EXAM Spring 2010 May 11, 2010 Name: ___________________________ Section: (Circle one) 1 (Rupnik, MWF 8:40 AM) 5 (Jin, TTh 12:10) 2 (Rupnik, MWF 10:40 AM) 6 (González, TTh 4:40) 3 (Zhang, MWF 12:40 PM) 7(Sprunger, TTh 1:40) 4 (Plummer, TTh 9:10) Please be sure to write (print) your name and circle your section above. Please turn OFF your cell phone and MP3 player! Feel free to detach, use, and keep the formula sheet. No other reference material is allowed during the exam. You may use either a scientific or a graphing calculator. GOOD LUCK! THERE IS A TOTAL OF 200 points SHOW WORK FOR THE NON-MULTIPLE CHOICE PROBLEMS

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1. (7 pts) You throw a ball towards a wall at speed v 0 = 25 m/s and at an angle θ 0 =30.0° above the horizontal. The wall is d =18.0 m from the release point of the ball. What is the vertical component of its velocity as it hits the wall? A) 4.35 m/s B) 7.35 m/s C) 17.94 m/s D) -4.35 m/s E) -7.35 m/s 2. A block of mass m and originally at rest slides a distance L down a frictionless incline at angle θ where it runs into a spring with spring constant k . When the block momentarily stops, it compresses the spring by a distance d . a) (7 pts) What is the distance L from the release to the moment it hits the spring? A) kd 2 2 mg sin + d B) kd 2 2 mg sin d C) kd 2 2 mg cos d D) kd 2 4 mg sin + d E) kd 2 2 mg cos b) (5 pts) After maximally compressing the spring at the lower left, the block is propelled upwards. Circle the only correct statement about work during the upward motion of the block, until it stops again. A) Work done by the normal force on the block is + mg d + L ( ) cos . B) Work done by the normal force on the block is mg d + L ( ) cos . C) Work done by weight (gravitational force) is mg d + L ( ) sin . D) Work done by weight (gravitational force) is + mg d + L ( ) sin . E) Work done by the spring force is zero .
3. Tornado Smith is driving a motorcycle around a loop-de-loop at a constant speed in a vertical circle. The motorcycle speed is

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## This note was uploaded on 05/20/2011 for the course PHYS 2101 taught by Professor Grouptest during the Spring '07 term at LSU.

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2010s_f - Physics 2101, FINAL EXAM Spring 2010 May 11, 2010...

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