1. A 50 kilogram person carries a 20 newton can to the top of a

3.0 meter high ladder and then drops it to the floor.

Calculate the potential energy of the can when it is

at the top of the ladder.

a.

[801)

b. Determine the kinetic energy of the can when it is

1.0 meter above the floor.

A5 foot by 5 foot box culvert is buried 6 feet beneath the surface of the ground. a crosssection of this very long culvert (into and out of the page) is illustrated below. assume that the soil in which the culvert is buried has the following properties: jt = 120 pcf, w = 12%, ko = 0.50, ka = 0.33, and kp = 3.00. calculate the total horizontal force per unit length of culvert (fh) felt on one of the vertical faces of the culvert.