A rod is bent into an L shape and attached at one point to a pivot. (Figure 1)The rod sits on a frictionless table and the diagram is a view from above. This means that gravity can be ignored for this problem. There are three forces that are applied to the rod at different points and angles: F1, F₂, and F3. Note that the dimensions of the bent rod are in centimeters in the figure, although the answers are requested in SI units (kilograms, meters, seconds). Figure F₁ 3 cm Pivot 8 cm < 1 of 1 F 30° If the L-shaped rod has a moment of inertia I = 9 kg m², F₁ = 12 N, F₂ = 27 N, and again F3 = 0, how long a time t would it take for the object to move through 45° (π/4 radians)? Assume that as the object starts to move, each force moves with the object so as to retain its initial angle relative to the object. Express the time in seconds to two significant figures. ► View Available Hint(s) t = Submit Part C ——| ΑΣΦ Now consider the situation in which F₁ = 12 N and F2 = 0, but now a force with nonzero magnitude F3 is acting on the rod. What does F3 have to be to obtain equilibrium? Give a numerical answer, without trigonometric functions, in newtons, to two significant figures. ► View Available Hint(s) F3 = Submit ΠΫΠΙ ΑΣΦ N
A rod is bent into an L shape and attached at one point to a pivot. (Figure 1)The rod sits on a frictionless table and the diagram is a view from above. This means that gravity can be ignored for this problem. There are three forces that are applied to the rod at different points and angles: F1, F₂, and F3. Note that the dimensions of the bent rod are in centimeters in the figure, although the answers are requested in SI units (kilograms, meters, seconds). Figure F₁ 3 cm Pivot 8 cm < 1 of 1 F 30° If the L-shaped rod has a moment of inertia I = 9 kg m², F₁ = 12 N, F₂ = 27 N, and again F3 = 0, how long a time t would it take for the object to move through 45° (π/4 radians)? Assume that as the object starts to move, each force moves with the object so as to retain its initial angle relative to the object. Express the time in seconds to two significant figures. ► View Available Hint(s) t = Submit Part C ——| ΑΣΦ Now consider the situation in which F₁ = 12 N and F2 = 0, but now a force with nonzero magnitude F3 is acting on the rod. What does F3 have to be to obtain equilibrium? Give a numerical answer, without trigonometric functions, in newtons, to two significant figures. ► View Available Hint(s) F3 = Submit ΠΫΠΙ ΑΣΦ N
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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