After a Long Night of Cramming for a Test, Your

Multiple Choice

After a long night of cramming for a test, your college room-mate hits his head forcefully against the wall of your room in despair. According to Newton's 3^rd Law, as he exerts a force against the wall, there must be an equal and opposite force. How does that opposite force show itself in this case?

A) Your room-mate is pulled downward by gravity
B) The wall exerts a force on your room-mate's head and he has a headache
C) The wall has a huge dent in it
D) There is an exception to the Law for solid objects like walls, so there is no opposite force
E) The resident assistant assigned to your floor makes a complaint against the two of you
3) 3 Newton's Universal Law of Gravitation