This sheep has a
mass of 90 kg and it is currently
standing on the
edge of a cliff looking
down. if the sheep has 24,500 j
of potential energy due to its
height, how high is the cliff?

Consider the following problem: a box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. find the largest volume that such a box can have.

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Could we see a galaxy that is 20 billion light-years away?