1. A weight of 18,000 lb is supported on a rectangular base plate that is 9 in. wide and 2 ft long. The base plate rests on a concrete slab. Determine the stress that the base plate exerts on the concrete slab. Express your answer in units of (a) lb/in.2 and (b) lb/ft2. (precision of 1 for (a) and of 1000 for (b))

a)

b)

Step-by-step explanation:

Given : A weight of 18,000 lb is supported on a rectangular base plate that is 9 in. wide and 2 ft long. The base plate rests on a concrete slab.

To find : Determine the stress that the base plate exerts on the concrete slab. Express your answer in units of (a) lb/in². and (b) lb/ft².

Solution :

a) A rectangular base plate that is 9 in. wide and 2 ft long.

Converting ft into inches,

1 feet = 12 inch

2 feet = 2×12= 24 inch

The area of the rectangular base is

The weight is W=18,000 lb.

The stress that the base plate exerts on the concrete slab is given by,

b) A rectangular base plate that is 9 in. wide and 2 ft long.

Converting inches into ft,

1 inch =

9 feet =

The area of the rectangular base is

The weight is W=18,000 lb.

The stress that the base plate exerts on the concrete slab is given by,

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step-by-step explanation: