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Q. An electric motor turns a flywheel through a drive belt that joins a pulley on the motor and a pulley that is rigidly attached to the flywheel. The flywheel is a solid disk with a mass of 88.0 kg and a radius R = 0.625 m. It turns on a frictionless axle. Its pulley has much smaller mass and a radius of 0.230 m. The tension Tu in the upper (taut) segment of the belt is 152 N, and the flywheel has a clockwise angular acceleration of 1.67 rad/s2. Find the tension in the lower (slack) segment of the belt.

Q. A gas expands when 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.

What is the overall change in the internal energy of the gas?

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  • Category:- Physics
  • Reference No.:- M9270634

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