College Physics (10th Edition)
10th Edition
ISBN: 9780321902788
Author: Hugh D. Young, Philip W. Adams, Raymond Joseph Chastain
Publisher: PEARSON
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Chapter 1, Problem 20P
A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1 25 cm and is 1 50 mm thick. (See Figure 1.23.) The density of brass is 8600 kg/m3. If you put this washer on a laboratory balance, what will it “weigh” in grams? (Recall that density is mass divided by volume and consult Chapter 0 as needed.)
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The force of the quadriceps (Fq) and force of the patellar tendon (Fp) is identical (i.e., 1000 N each). In the figure below angle in blue is Θ and the in green is half Θ (i.e., Θ/2). A) Calculate the patellar reaction force (i.e., R resultant vector is the sum of the horizontal component of the quadriceps and patellar tendon force) at the following joint angles: you need to provide a diagram showing the vector and its components for each part. a1) Θ = 160 degrees, a2) Θ = 90 degrees. NOTE: USE ONLY TRIGNOMETRIC FUNCTIONS (SIN/TAN/COS, NO LAW OF COSINES, NO COMPLICATED ALGEBRAIC EQUATIONS OR ANYTHING ELSE, ETC. Question A has 2 parts!
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Chapter 1 Solutions
College Physics (10th Edition)
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