A wheel on a shaft is initially at rest, when a motor starts to supply constant...
A flying wheel with a moment of inertia of 4kg m2 is initially at rest. If a torque of 10 Nm (clockwise) is suddenly applied to the flywheel, what will be the speed of the flywheel after!5 seconds
A motor drives a disk initially at rest through 24.4 rotations in 5.0s. Assume the vector sum of the torques caused by the force exerted by the motor and the force of friction is constant. The rotational inertia of the disk is 4.0 kg*m^2. When the motor is switched off, the disk comes to rest in 12s. A) What is the magnitude of torque created by the force of friction? B) What is the magnitude of torque caused by the...
The total mass of a shaft and other rotating parts is 2100 kg with a radius of inertia is 240 mm. The shaft, initially at rest is coupled to an electrical motor by one plate with two-contact surfaces with an inner and outer diameters of 180 and 280 mm respectively. The axial force on the coupling is 675 N and p = 0.34. The motor and its rotating parts have a total mass of 750 kg and a radius of...
A person sits on a frictionless stool that is free to rotate but is initially at rest. The person is holding a bicycle wheel (I = 3 kg*m2) that is rotating at 8 rev/s in the clockwise direction as viewed from above, and the moment of inertia of the person-wheel-stool system is 9 kg*m2. For this problem, all answers involving a rotational component will be expressed in revolutions rather than radians. 1. What is direction of the angular momentum of...
A child pushes her friend (m = 25 kg) located at a radius r = 1.5 m on a merry-go-round (rmgr = 2.0 m, Imgr = 1000 kg*m2) with a constant force F = 90 N applied tangentially to the edge of the merry-go-round (i.e., the force is perpendicular to the radius). The merry-go-round resists spinning with a frictional force of f = 10 N acting at a radius of 1 m and a frictional torque τ = 15 N*m...