The shear force of a cantilever beam of length $$l$$ and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is _________ at the fixed end.
A. Zero
B. $$\frac{{{\text{w}}l}}{4}$$
C. $$\frac{{{\text{w}}l}}{2}$$
D. $${\text{w}}l$$
Answer: Option C
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