For a system having a mass of 1 lb whose velocity increases from 50 ft/s to 100 ft/s while its elevation decreases by 40 ft at a location where g= 32.0 ft/s2, Determine: Change in Kinetic Energy in BTU Change in Potential Energy BTU

There is a piston-cylinder system that undergoes a process. The total work done by the system, W, is 50 kJ, and thechange in the specific internal energy of the system, Δu, is −7 kJ/kg. We also know the total mass of the system, m, is 10kg. During the process, both the change of kinetic energy and the change of potential energy are negligible. Pleasedetermine 1) the total energy change, ΔE, in kJ; 2) the total heat transfer, Q, in kJ; and 3) judge the direction of energyflow for the heat transfer: into the system or out of the system.

A 40 lb object is subjected to an applied upward force of 20 lbf. The only other force acting on the object is the force of gravity. The acceleration of gravity is 32.2 ft/s². Determine the weight of the object, in lbf, and the net acceleration of the object, in ft/s². Step 1 Determine the weight of the object, in lbf, with positive values being down. W = 40 lbf Hint Step 2 Your answer is correct. * Your answer is incorrect. Determine the net acceleration of the object, in ft/s², with positive values being upward. 16.1 ft/s² a = Attempts: 1 of 3 used

A construction crane weighing 12,000 lbf fell from a height of 500 ft to the street below during a severe storm. For g = 32.05 ft/s², determine the mass, in lb, and the change in gravitational potential energy of the crane, in ft-lbf.