Calculate the efficiency of an engine if the work input is 300. J and the work output is 100. J

Ten students stand in a circle and are told to make a transverse wave. what best describes the motion of the students? each student bumps the shoulder of his or her neighbor. at the exact time, all students take a step to the right. the students skip clockwise, going in a circular motion. one at a time, each student lifts his or her hands up and then down.

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

If forces acting on an object are unbalanced. true or false