11°
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.2: The Law Of Cosines
Problem 3E
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20. A 10-pound weight is lying on a sit-up bench at the gym. If the bench is inclined at an angle of 11 degrees, there are three forces acting on the weight. N is called the normal force and it acts in the direction perpendicular to the bench. F is the force due to friction that holds the weight on the bench. If the weight does not move, then the sum of these three forces is 0.
Find the magnitude of N and the magnitude of F. Apply the rules regarding the use of significant digits when determining your answers.
N= ? And F=? Lbs
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