A force F = 12 Ni 10 N ; acts on an object. How much work does this force do as the object moves from the origin to the point r = 14 mi + 11 mj?

Does work output exceed work input when a machine is used? a) yes, it does, as machines create energy. b) it depends on the type of machine used. c) no, it doesn’t, as machines are inefficient. d) no, it doesn’t, as machines cannot create energy.

Work = force × a. work b. energy c. distance d. momentum

Most short-period comets do not have randomly oriented orbits because