Q. A force of 315 N is applied horizontally to a wooden crate in order to displac eit 35.0 m accorss a level surface at a constant velocity. As a result of this work the crate's internal energy is increased by an amount equal to 14 percent of the crate's initial internal energy. Calculate the initial internal energy of the crate.

Q. A student bikes to school by traveling first Dn = 1.10 miles north, then Dw = 0.500 west, and finally Ds= 0.500 south. If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the school, what distance Db would the bird cover?