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Emch212_Exam1

# Emch212_Exam1 - Name THE PENNSYLVANIA STATE UNIVERSITY...

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Name Section THE PENNSYLVANIA STATE UNIVERSITY Department of Engineering Science and Mechanics Engineering Mechanics 212 — Exam 1 February 9, 2010 Problem 1 Problem 2 Problem 3 Total General Instructions Do not take the exam apart. Distinguish between vectors and scalars. Ffailure do so will result in a credit reduction for each problem in which the issue occurs. Only write on the front of each page. You should have more than enough room using the two front pages provided for each problem. Be neat and show all of your work. Clearly indicate the section to which you belong. Here is a reminder about the instructors and meeting times for each E MCH 212 section offered this semester: Section # Instructor Meeting Time 1 Costanzo 09:05am–09:55am 2 Costanzo 10:10am–11:00am 3 Miller 01:25pm–02:15pm 4 Zhang 02:30pm–03:20pm 1

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Problem 1 (34 pts) A water jet is emitted from a nozzle at O with a speed v 0 D 48 ft = s . If d D 3 ft , R D 15 ft , and D 40 ı , determine the height h on the wall to which the water is projected. Solution We assume that, once out of the nozzle, water particles are only subject to a constant gravity causing a downward accel- eration with magnitude g D 32:2 ft = s . Using the component system shown in the figure on the right, the acceleration of
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Emch212_Exam1 - Name THE PENNSYLVANIA STATE UNIVERSITY...

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