A weightless bar is loaded as shown. Find the reaction forces at the supports A and E, then find the internal shear forces and bending moments.

a. The vertical reaction forces at supports are

b. From x=0 to x=1 m: the shear is From x= 1 to x= 3 m: the shear is From x == 3 to x = 4 m: the shear is From x=0 to x=1 m: the moment is From x = 1 to x = 2 m: the moment is From x = 2 to x = 3 m: the moment is From x =3 to x== 4 m: the moment is c. Across the beam, the shear forces are: