Accelerated Frames - Quiz 5 with Solutions | PHYS 2050, Quizzes of Physics

Download Accelerated Frames - Quiz 5 with Solutions | PHYS 2050 and more Quizzes Physics in PDF only on Docsity! PHYS 2050 Fall 2011 Quiz #5 - Accelerated Frames Instructions: answer all problems and show all relevant work needed to find solution. Circle your final answer. Some (possibly) useful equations and constants ΣF = ma ! Ff = μkN# Ff = μsN ac = v2/r Problems: 1. (10 pts) A coin is placed a distance r from the center of a rotating, horizontal turntable. It begins to slip when it’s speed reaches vslip. Draw a free-body diagram of the coin: (a) what force(s) causes the centripetal acceleration? (b) What is the coefficient of static friction between the coin and turntable in terms of r, vslip, and g? 2. (10 pts) An object of mass m is suspended from the ceiling of an accelerating truck as shown below. The truck accelerates with a constant acceleration a, and the string makes an angle θ with the vertical. Draw a free-body diagram for the mass and determine both the angle θ and tension T in the string in terms of m, a, and g. Gad Cot #S [aa M A> Vsiro view Faw a besve _) xe a Ly @ Forte Sb frat Cee stot 2) pore ‘dec Canrepy v4 fey ce r Causi, Conte gerd aocaluve Es way (b) ZR. = Fee mye 3 A eng => Fe = Ars Nap tony vz Ms M4 =—M ae Zz