Which of the following statements is/are true? check all that apply. check all that apply. the total mechanical energy of a system is constant only if all the forces doing work on it are nonconservative. the total mechanical energy of a system is constant only if all the forces doing work on it are conservative. the total mechanical energy of a system is equally divided between kinetic and potential energy. mechanical energy can be dissipated to nonmechanical forms of energy. the total mechanical energy of a system, at any one instant, is either all kinetic or all potential energy.

A33.1 g copper object is launched from a 1.5 m 30° steel incline positioned on the floor by being pulled up a string attached to a 50.0 g mass suspended vertically over a pulley. the object is projected towards a glass table where it lands when it is at the point along its trajectory with the lowest speed. it comes to a halt when it clears the opposite edge of the table. it then falls and lands on 9 physics texts each 5 cm thick that are stacked on the floor on the opposite side of the table. assume that the table does not have a ledge and the rectangular object experiences 0.05 n of air resistance as it falls towards the books. how far and how long did the object travel and how fast does it hit the books. assume that at the moment the copper object leaves the incline, the massless string and ideal pulley break off

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

The slope of a velocity time graph over any interval of time gives the during that interval