An object, which is initially at rest on a frictionless horizontal surface, is acted upon by four constant forces. Fi is 14.6 N acting due cast, F2 is 28.6 N acting due north, F3 is 47.8 N acting due west, and FA is 24.0 N acting due south. How
much total work is done on the object in 4.44 s, if it has a mass of 22.0 kg?

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final