Multiple Choice
A 2-m long bar is free to rotate about an axis located 0.7 m from one of its ends. Two forces act on the bar, F1 = 100 N and F2 = 200 N, and both make 30° with the bar. Find the Net Torque on the bar. Use +/− to indicate direction.
14. Torque & Rotational Dynamics
Net Torque & Sign of Torque
Back14. Torque & Rotational Dynamics
Net Torque & Sign of Torque
- Open QuestionThree forces are applied to a wheel of radius 0.350 m, as shown in Fig. E10.4. One force is perpendicular to the rim, one is tangent to it, and the other one makes a 40.0° angle with the radius. What is the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center?
- Open QuestionA 1.0 kg ball and a 2.0 kg ball are connected by a 1.0-m-long rigid, massless rod. The rod is rotating cw about its center of mass at 20 rpm. What net torque will bring the balls to a halt in 5.0 s?
- Open QuestionAn object's moment of inertia is 2.0 kg m^2. Its angular velocity is increasing at the rate of 4.0 rad/s per second. What is the net torque on the object?
- Open QuestionA satellite follows the elliptical orbit shown in FIGURE P12.77. The only force on the satellite is the gravitational attraction of the planet. The satellite's speed at point 1 is 8000 m/s.a. Does the satellite experience any torque about the center of the planet? Explain.
- Open Question
(II) Determine the net torque on the 2.0-m-long uniform beam shown in Fig. 10–56. All forces are shown. Calculate about
(b) point P at one end.
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- Open Question
If the coefficient of static friction between a car’s tires and the pavement is 0.65, calculate the minimum torque that must be applied to the 66-cm-diameter tire of a 1250-kg automobile in order to “lay rubber” (make the wheels spin, slipping as the car accelerates). Assume each wheel supports an equal share of the weight.