4. A uniform disk with a mask of 0.45 kg and a diameter of 0.25 m, accelerates from rest to a speed of 6.28 rad/s in 5.0 s. Find the magnitude of the (a) angular acceleration, and (b) applied torque.
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- A net torque with a magnitude of 10.0 N.m acts on an object that starts at rest. Find the magnitude of the final angular speed after 7.0 seconds if the object is a thin spherical shell of 2.5 kg and radius 330 cm.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 0/104. There are four forces acting on a thin rod as shown in figure. (a) Calculate the net torque t, acting on net the thin rod of length L = 3.00 m and mass m = 2.00 kg. Calculate (b) the moment of inertia (I %3D %3D %3D ML2) and (c) the magnitude of the angular acceleration. The point O on the left is the rotation point. 2 N (a) Tnet %3D 3 N L/2 (b) I = 3 N [C) α =
- A 1702 kg solid sphere with a radius of 2.6 m rolls without slipping down an incline of 0 = 41°. If the sphere makes 6 full revolutions in 8.4 seconds. 1. The rotational inertia of the sphere is kg.m2 2. The frictional force between the incline and the sphere is 3. The angular velocity at point C on the sphere is rad/s 4. The speed of the center of mass of the Sphere is m/s 5. The distance S after 6 full revolutions is mA 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 QuestionA merry-go-round accelerates from rest to 0.72 rad/s in 37 s. Assuming the merry-go-round is a uniform disk of radius 8.0 m and mass 3.20×104 kg , calculate the net torque required to accelerate it.
- 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.) radA playground merry-go-round, made in the shape of a solid disk, has a diameter of 2.50 m and a mass of 350.0 kg. Two children, each of mass 30.0 kg, sit on opposite sides at the edge of the platform. Approximate the children as point masses. What torque is required to bring the merry-go-round from rest to 28.0 rev/min in 23.0 s?