In a Classroom Demonstration,a 79

Multiple Choice

In a classroom demonstration,a 79.2-kg physics professor lies on a "bed of nails." The bed consists of a large number of evenly spaced,relatively sharp nails mounted in a board so that the points extend vertically outward from the board.While the professor is lying down,approximately 1950 nails make contact with his body.
-What is the average force exerted by each nail on the professor's body?

A) 0.201 N
B) 0.398 N
C) 1.42 N
D) 0.809 N
E) 142 N