Find the magnitude of the net torque (in N.m) on the wheel shown in the Figure about the axle through O, taking a= 10 cm, b= 30 cm and F = 47N
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- A bar of length 3.00 m is hinged at one end and experiences a force of 8.00 N at the other end. The torque applied is 10.0N⋅m. What must be the angle between the line of force and the extended line of the bar ϕ?When you hold an ball by only your forearm, the main lifting muscle in your arm is the biceps. Suppose the mass of a forearm with hand is 1.80 kg. The biceps is connected to the forearm a distance of 2.50 cm from the elbow, and it holds a 44.5 N (about 10 lbs) ball at the end of the forearm at distance of 35.0 cm from the elbow. What is the magnitude of the torque about the elbow by the ball, in N·m? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.Find the net torque on the wheel in the figure below about the axle through O, taking a = 13.0 cm and b = 31.0 cm. (Assume that the positive direction is counterclockwise.) N·m 12.0 N 30.0% 10.0 N 9.00 N
- A counterweight of mass m = 3.60 kg is attached to a light cord that is wound around a pulley as shown in the figure below. The pulley is a thin hoop of radius R = 7.00 cm and mass M = 3.00 kg. The spokes have negligible mass. (a) What is the net torque on the system about the axle of the pulley? V N.m to the right along the axis of rotation v magnitude 2.4695 direction (b) When the counterweight has a speed v, the pulley has an angular speed w = v/R. Determine the magnitude of the total angular momentum of the system about the axle of the pulley. (3.705 Note that your numerical answer is multiplied by the symbol v in the answer box. kg • m)v (c) Using your result from (b) and 7 = L/dt, calculate the acceleration of the counterweight. (Enter the magnitude of the acceleration.) 6.925 The expression for the angular momentum in part (b) has a factor of v. How do you determine dL/dt, from this expression? m/s2Suppose you exert a force of 185N tangential to the outer edge of a grindstone (which is a solid disk) with a radius of 1.56m and a mass of 74kg. What is the angular acceleration of the grindstone αf, in radians per square second, if there is an opposing frictional force of 22.5 N exerted 0.45 m from the axis?The flywheel of an engine has a moment of inertia of 2.50kg.m2 about its rotation axis. What constant torque is required to bring it up to an angular speed 400rrev/min of in 8.00 s, starting from rest?
- A bicycle wheel, of radius 0.300 m and mass 1.59 kg (concentrated on the rim), is rotating at 4.00 rev/s. After 52.8 s the wheel comes to a stop because of friction. What is the magnitude of the average torque due to frictional forces?A force in the +y direction applied at the point x = 8.1 m, y = 8.1 m gives rise to a torque of 63.7 Nm about the origin. Determine the magnitude of the force. Express your answer in N, to at least one digit after the decimal point. plz help use g = 9.8