A 15 kg object collides with a 2 kg object that is traveling to the right at 1 m/s. After the collision the 15 kg object is traveling to the right at 2.53 mis and the 2 kg object is traveling to the right at 4.53 m/s. How fast and in what direction was the 15 kg object initially traveling?

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