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Consider a simply supported beam subjected to a concentrated load, as shown below.  The beam has two vertical reactions. There is a reaction force at A and there is one at B. Is it true that these reaction forces are equal in magnitude?  

The beam shown below consists of 4 segments labeled AB, BC, CD, and DE.     a) What is the magnitude of the shear force in segment AB?   c) What is the magnitude of the shear force in segment BC?   b) What is the magnitude of the shear force in segment CD?   d) What is the magnitude of the shear force in segment DE?

Consider the following beam and its shear diagram.     The shear force becomes zero in the left segment of the beam, as marked on the diagram above. Where is the location of zero shear? Specify the distance from the left end of the beam to that location.

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Consider the following statements. One is the main point, and the others are details to support the main point. The main point is that ___________________________.

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