An experimental car is designed to work by accumulating energy in a flywheel shaped as a solid disc. To make the car move, the flywheel is "charged" by attaching it to an external machine able to exert a torque on the wheel ofr = 1000 Nm, so that the flywheel is accelerated and accumulates rotational kinetic encrgy. The friction of the flywheel with its axle bearings is negligible, and it has a radius R = 1.2 m and a mass m = 631.5 kg. a) If the flywheel is "charged" for 10 minutes from rest, determine its final angular velocity. Wf : 1319.61rad/s b) Determine the total rotational kinetic energy accumulated by the flywheel during this time. RKE - 3.958 X 10 Nm c) If all the energy contained in the flywheel is used to accelerate (from rest) a car of mass M = 2523.4 kg, determine the final velocity of the car. To make the calculation casier, ignore the friction between the car and the asphalt and air resistance. Vf : 560.IS m/s

Someone frequently throws a tennis ball for their dog to chase.Throughout the throwing motion, the angular velocity of their arm is 6.7radians/s, and the radius of rotation of the ball is 63.0 cm.One day they decide to test out a ball-throwing tool which effectivelyextends the radius of rotation by an extra 36 cm. Assuming all othervariables are equal, how much faster (in m/s) can they throw the ballwhen they use the launcher compared to when they don't?Express your answer to 2 decimals, and don't include units+.      Please type answer not write by hend

A uniform disk (1=1/2 mR2) has a mass of 3 kg and a radius of 2m. The disk is mounted on frictionless bearings and is used as a turntable. The turntable is initially rotating at 120 rpm (revolutions per minute, convert it to rad/s). A hollow cylinder has the same mass and radius as the disk. It is released from rest, just above the turntable, and on the same vertical axis. The hollow cylinder slips on the turntable for 0.20 s until it acquires the same final angular velocity as the turntable. (HINT: Note that some of the information given is not needed! Think which conservation law(s) apply.) The final angular momentum of the system is closest to: L = Submit [5] ΑΣΦ Request Answer ? kg. m²/s 4

Trucks can be run on energy stored in a rotating flywheel, with an electric motor getting the flywheel up to its top speed of 683 rad/s. One such flywheel is a solid, uniform cylinder with a mass of 535 kg and a radius of 1.2 m that rotates about its central axis. What is the kinetic energy of the flywheel after charging?  If the truck uses an average power of 8.4 kW, for how many minutes can it operate between chargings?