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- a.) In the following free body diagram of the knee and lower leg, draw the moment arm (dw) for the weight force (Fwt) and the moment arm (dm) of the muscle force (Fm). b.) What are the directions of each torque caused by these forces.A 120 g ball and a 220 g ball are connected by a 30-cm-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm What is the speed of the 120 g ball? Express your answer with the appropriate units. v= μÀ Value Submit Units ? Units input for part A Previous Answers Request AnswerPlease Asap
- Part B The force of the added water produces a torque on the dam. In a simple model, if the torque due to the water were enough to cause the dam to break free from its foundation, the dam would pivot about its base (point P). What is the magnitude T of the torque about the point P due to the water in the reservoir? Express your answer in terms of quantities given in the problem introduction and the magnitude of the acceleration due to gravity g. T= Submit 15. ΑΣΦ Request Answer ?A square metal plate 0.180 m on each side and mass 1.52 kg is pivoted about an axis through point O at its center and perpendicular to the plate (Figure 1). You may want to review (Page). For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Applying a torque. Figure 0.180 m 0.180 m 45° F1 1 of 1 Provide FWhile riding a multispeed bicycle, the rider can select the radius of the rear sprocket that is fixed to the rear axle. The front sprocket of a bicycle has radius 12.5 cm. Part A If the angular speed of the front sprocket is 0.500 rev/s, what is the radius of the rear sprocket for which the tangential speed of a point on the rim of the rear wheel will be 4.00 m/s? The rear wheel has radius 0.320 m. Express your answer in meters. ? m Submit Request Answer
- A 1.15-kg grinding wheel 22.0 cm in diameter is spinning counterclockwise at a rate of 20.0 revolutions per second. When the power to the grinder is turned off, the grinding wheel slows with constant angular acceleration and takes 80.0 s to come to a rest Part A What was the angular acceleration (in rad/s) of the grinding wheel as it came to rest if we take a counterclockwise rotation as positive? Express your answer in radians per second squared. V ΑΣΦ Submit Request Answer Part B ? rad/s2 How many revolutions did the wheel make during the time it was coming to rest? Express your answer as a number of revolutions. ΜΕ ΑΣΦ Submit Request Answer Provide Feedback ? revolutions Next>>Plz solve4. For this problem, you are free to use a table for moments of intertia in your calculation. For this problem, please reference the image below. You are working in your machine shop in Kalamazoo, MI, where you construct the item in the image below. It consists of a tungsten disk of mass 2.4 kg and radius 50 cm. Mounted on this disk is a silicon carbide ring of mass 1.2 kg. This ring has an inner radius 20 cm and outer radius 30 cm. The disk rotates about an axis through it’s center at a rate of 12 rev/s (a) What is the moment of inertia of this system? (b) What is the rotational kinetic energy of this system? axis 50 cm 30 cm 20 cm
- What is the torque from the horizontal force F → about the center of the sphere?An old-fashioned single-play vinyl record rotates on a turntable at 45.0 rpm. What are (a) the angular velocity in rad/s and (b) the period of the motion? Part A Express your answer with the appropriate units. Value Submit Part B O μA Submit Value undo μà Units Request Answer Express your answer with the appropriate units. Units ? Request Answer ?Two woights are connoctod by a vory lIght, Moxblo cord that passes over an 62.0 N frictionless pulluy of radius 0.300 m The pulley is a solid uniform disk and is supported by a hook connected to the ceiling (Figure 1) Part A What force does the ceiling exert on the hook? Express your answer with the appropriate units. Figure 1 of1 > F. Value Units Submit ResuestAnawer Provide Feedback 125 N 75.0 N