test 1

# test 1 - Brian Joseph Fuqua PHGN100 Spring 2006 Test...

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- PHGN100, Spring 2006 1 Test 1-Multiple Choice 4 point(s) θ F yc A cart with mass 15.3 kg is moving to the left with initial speed of 4.1 m/s. You catch and stop it by pushing down at an angle of 14.0 degrees with respect to the vertical as shown above. Your force as a function of time is given by F yc ( t ) = bt 3 where b = 8.85 N/s 3 . You can assume that the wheels on the cart are good enough that you can neglect friction between the cart and ground. How long does it take you to stop the cart? 4 pt (in s ) 1 . A ± 1.0515 B ± 1.3985 C ± 1.8601 D ± 2.4739 E ± 3.2903 Brian Joseph Fuqua - PHGN100, Spring 2006 2 Test 1-Multiple Choice 5 point(s) You are holding a book of mass 4.5 kg against a vertical wall by exerting a force of magnitude F yb = 40.0 N at an angle of θ = 34.3 degrees, as indicated in the Fgure. If the coe±cients of friction between the book and the wall are μ s = 0.59 and μ k = 0.44, Fnd the magnitude of the frictional force from the wall on the book. 5 pt

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## This note was uploaded on 04/19/2008 for the course EGGN 389 taught by Professor Ammerman during the Spring '08 term at Mines.

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test 1 - Brian Joseph Fuqua PHGN100 Spring 2006 Test...

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