A machine does 2500Conduction happens as energy flows from a warmer object to a cooler object. Which of the following is an example of conduction? J of work in 50 s. What is the power developed by the machine?

A14 kg rock starting from rest free falls through a distance of 5.0 m with no air resistance. find the momentum change of the rock caused by its fall and the resulting change in the magnitude of earths velocity. earth mass is 6.0 * 10^24 kg. show your work assuming the rock earth system is closed.