Answer Posted / manikandan v.s.

Hinge Supports are restrained to Horizontal and Vertical
Movements but they are free to Rotate. hence in a hinged
support we get Horizontal and Vertical Reactions but no
moment.
Roller Support are restrained to only with Vertical
Movements and hence we get only a Vertical Reaction. The
Horizontal Reaction and Moment is zero.

Simple Example for roller support is a book lying on a
table. is free to move across the length and bredth of the
table and is free to rotate also. but vertical movement is
not possible.
Eg. for Hinge Support is the Door. we cannot move the door
Vertically or horizontally but it can rotate, making it to
open and close

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