# HW3 - University of California San Diego Department of...

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University of California, San Diego, Department of Bioengineering BE 109: Statics and dynamics Issued: 01/26/05 (Tuesday) Homework Set 3 Due: 02/02/05 (Tuesday) Exercise 1 . A 32-lb motor is mounted on the floor. Find the resultant of the weight and the forces exerted on the belt, and determine where the line of action of the resultant intersects the floor. 60 lb 140 lb Exercise 2. Rod AB is acted upon by a couple M and two forces, each of magnitude P. a) Derive and equation in θ , P, M, and l which must be satisfied when the rod is in equilibrium. b) Determine the values of θ corresponding equilibrium when M = 150 lb-in., P = 20 lb, and l = 6 in.

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Exercise 3. The position of a particle at times t = 10 sec and t = 5 sec is known to be, respectively: r (10) = [10 i +5 j -10 k ] m r (5) = [3 i +2 j +5 k ] m What is the acceleration of the particle at time t = 5 sec if the velocity vector has the form
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## This note was uploaded on 04/23/2008 for the course BENG 109 taught by Professor Ping during the Winter '06 term at UCSD.

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HW3 - University of California San Diego Department of...

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