Astudent becomes so excited by the whole idea of black holes that he decides to jump into one. it has a mass 10 times the mass of our sun. what is the trip like for him? what is it like for the rest of the class, watching from afar?

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?