Consider a force F = 80 N applied to a beam as shownin Fig. 8–37. The length of the beam is l = 5.0 m, and0 = 37°, so that x = 3.0 m and y = 4.0 m. Of thefollowing expressions, which ones give the correct torqueproduced by the force F around point P?(a) 80 N.(b) (80 N)(5.0 m).(c) (80 N)(5.0 m)(sin 37°).(d) (80 N)(4.0 m).(e) (80 N)(3.0 m).) (48 N)(5.0 m).(g) (48 N)(4.0 m)(sin 37°).PFIGURE 8–37MisConceptual Question 5.

Answered: Consider a force F = 80 N applied to a…

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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(5) For a body to be stationary in a frame of reference, what conditions must be met regarding forces and torques? Explain what not meeting each of the conditions will result in. (a) Show that the moment of inertia of a uniform thin rod (ruler, shaded grey below in figure) of length L and mass M rotating about its center is 1/12 ML² y (m)4 L/2 F -L/2 L/2 X (m) A constant tangential force of F-2 N (shown) is applied at the end to the initially stationary uniform thin rod of mass 2 kg and length L-6m pivoted about its center at the time t=0 s. This will rotate the rod. (b) Calculate the torque (Nm), and (c) the moment of inertia of the rod. (d) Calculate the angular acceleration of the rod (a rads/s²). (e) What is the angular displacement 0 at t = 1s (in radians and in degrees). (f) What is the angular velocity of the rod v at t = 1s. (g) What are the speeds of the tips of the rod at t = Is (they are the same). 0 -L/2 0 00
Dont use AI A tall, cylindrical chimney falls over when its base is ruptured. Treat the chimney as a thin rod of length 53.2 m. At the instant it makes an angle of 34.1° with the vertical as it falls, what are (a) the radial acceleration of the top, and (b) the tangential acceleration of the top. (Hint: Use energy considerations, not a torque.) (c) At what angle θ is the tangential acceleration equal to g? Assume free-fall acceleration to be equal to 9.81 m/s2.
A cylindrical bar with a sphere firmly attached to one end is originally at rest in a horizontal position. The bar is pivoted about a free hinge at one end (Figure 8-61). The bar is 4.00 m long and has a mass of 231 kg. The sphere has a radius of 60.0 cm and a mass of 53.0 kg. A variable torque is applied to lift the bar by rotating it 37.0° about the pivot at a constant angular speed. Calculate the work done by the variable torque.
A thin rectangular plate is acted upon by 4 forces as shown. The 200 N makes an angle of 30 degrees with the horizontal. Calculate the net torque on this plate about the center A due to the four forces shown assuming there is no friction at the center. Note: (Angle at a is 30 degrees)
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(7%) Problem 10: A soccer player extends her lower leg in a kicking motion by exerting a force with the muscle above the knee in the front of her leg. Suppose she produces an angular acceleration of 30.5 rad/s² and her lower leg has a moment of inertia of 0.75 kg-m? . What is the force, in newtons, exerted by the muscle if its effective perpendicular lever arm is 2.1 cm? Grade Summary F = | Deductions 0% Potential 100% Submissions tan() sin() cotan() atan() cosh() oDegrees cos() 7 8. 9. НОME Attempts remaining: 10 (0% per attempt) detailed view asin() E 1^^ 4 acos() sinh() cotanh() 5 * acotan() tanh() 2 3 + END - Radians VOl BACKSPACE DEL CLEAR Submit Hint Feedback I give up! Hints: 0% deduction per hint. Hints remaining: Feedback: 0% deduction per feedback. 1.
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16) Angular acceleration can be produced by: (a) Power (b) Torque (c) Pressure (d) 17) The minute hand of a large clock is 3.0 m long. What is its mean angular speed? (a) 1.4 x 10 rads- (b) 1.7 x 103 rads" (c) 5.2 x 103 rads" 18) In vertical circle, the minimum speed of the body at highest point is (a) v = √2gr (b) v = √3gr (c) √5gr 500 Kgm² 19) Moment of Inertia of 100 Kg sphere having radius 50 cm will be (a) 10 Kgm² (b) 5 Kgm² (c) Temperature (d) 1.0 x 10-1 rads-1 (d) 13 = = √gr (d) 2.5 Kgm² 20) A body rotates with a constant angular velocity of 100 rad/sec about a vertical axis. The torque (a) required to sustain this motion will be Zero Nm (b) 21) Torque acting on body determines its (a) Linear acceleration (b) 22) Force and torque are analogue of force (a) (b) Acceleration (c) Each other 23) An elevator moving upward such that it moves with accelerationa=2g, what will be the real weight of a 100 Nm (c) 200 Nm (d) 300 Nm Impulse (c) Angular Acceleration (d) Linear Momentum…

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