The acceleration due to gravity on earth is 9.8m/s2. what is the weight of a 75 kg person on earth?
a. 9.8 n
b. 75 n
c. 85 n
d. 735 n

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.