Q4: A captain of a ship turns the stirring wheel by applying a 20 N toque. If he applies the force at a radius of 0.2 m from the axis of rotation, at an angle of 80 degrees to the line of action (moment arm), what torque does he apply? (3.94 N.m )

A 15.2 m long crane makes an angle of 25.0° with the horizontal. A 482 kg wrecking ball hangs vertically from the end of the crane. What torque does it cause about the base of the crane? Equations: Fg = mg     t = Fr sinq

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/s2

Starting from rest, a 10.8cm diameter compact disk takes 7.96s to reach its operating rotational speed of 1920.0 rpm (revolutions per minute). Assume that the angular acceleration is constant. The disk's moment of inertia is 3.88E-5kg.m². How much torque is applied to the disk? Submit Answer Tries 0/10 How many revolutions does it make before reaching full speed? (Do not enter a unit.) Submit Answer Tries 0/10

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 flywheel (I 49 kg m' 21 starting from rest acquires an angular velocity of 233 rad/s while subject to a constant torque from a motor for 5 s. a. What is the angular acceleration of the flywheel? rad/s? b. What is the magnitude of the torque? N m Question Help: Message instructor Submit Question

A circular disk with a radius of 0.38 m is subject to 2 tangentially applied forces. The disc is fixed such that it will rotate about its center. Both forces produce a torque in the same direction. F1 = 3.6 N applied at the outer edge of the disc. F2 = 4.3 N applied at a distance of 0.28 from the center of the disc. What is the net torque on the disc?

Consider the 13 kg motorcycle wheel shown in the figure. Assume it to be approximately a ring with an inner radius of 0.285 m and an outer radius of 0.325 m. The motorcycle is on its center stand, so that the wheel can spin freely. If the drive chain exerts a force of 2200 N at a radius of 4.95 cm, what is the angular acceleration of the wheel, in radians per square second?  What is the tangential acceleration, in meters per square second, of a point on the outer edge of the tire?   How long, in seconds, starting from rest, does it take to reach an angular velocity of 89.5 rad/s?

A power drill starts from rest and undergoes uniform angular acceleration for a period of 0.175 s until it turns at a rate of 2.80 x 104 rev/min. (a) What is the drill's angular acceleration (in rad/s2)? (Enter the magnitude.) rad/s2 (b) What is the angle (in radians) through which the drill rotates during this period? (Enter the magnitude.) rad

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