2. A small disk of mass 2 kg is constrained to move in a circular path by a light rod of length 3. The linear velocity of the disk is 3 m/s. A piece of putty with a mass of 0.1 kg is dropped onto the disk. If the radius of the circular path remains constant, what is the linear velocity of the disk-putty system

A75-hp (shaft output) motor that has an efficiency of 91.0 percent is worn out and is to be replaced by a high-efficiency motor that has an efficiency of 95.4 percent. the motor operates 4368 hours a year at a load factor of 0.75. taking the cost of electricity to be $0.12/kwh, determine the amount of energy and money saved as a result of installing the high-efficiency motor instead of the standard motor. also, determine the simple payback period if the pu