Midterm Exam with Answer key - General Physics I Non Calculus | PHYS 2010, Exams of Physics

Download Midterm Exam with Answer key - General Physics I Non Calculus | PHYS 2010 and more Exams Physics in PDF only on Docsity! PHYS 2010-001 Fali 2010 October 20, 2010 Exam 2 Name Ke of _ De Ke oF You must show all work and use proper units and significant digits for full credit. Calculators and notes are allowed, books are noi 1. A light fixture is supported by three cables as shown in the Figure. The cable attached to the ceiling is very strong while the cable attached fo the wall has a strength rating of 200 N. Find the maximum weight of the light fixture that can be supported by this system of cables. (20 points) = goon 1 x 4 (oon )oos 20 7— Tes Be 217.5 200+ OR? 2 0.20 ye (200M ys ino Ersuysins? oe mg mg = 237 __ 23/0 | 2, A student decides to move a 25.0-kg box of books into her doraiitory room by pulling on a rope attached to the box. The breaking strength of the rope is 200 N. She pulls with a force directed at a 25.0" above the horizoutal. With what maximum acceleration car she pull the box if: a) The floor is frictionless? (20 points) ni b) (Extra eredid The coefficient of kinetic friction with the floor is 0.3007 (10 points) ¢ 6 z00 cos25°> O.3:p = (250 uy Oy n noon oon \siniS?~ 28.014:9.30 4 = n + Zoon}sint 939220 ™§ y= 26.0:4.80 - 200.sinzs%= /60.5.0/ 5 ° fan \ 2a cos28 °~ O38 (60.50 j 53m 20 s