Mechanics Quiz - Objective & Theoretical Questions

A fixed support is a type of support that prevents both translation and rotation at the point of contact. It is often represented as a rigid wall or a fixed pin.

A roller support is a type of support that allows translation in one direction but prevents rotation. It is often represented as a cylindrical roller on a horizontal track.

A hinged support is a type of support that allows rotation but restricts translation. It is often represented as a pin joint.

The centroid of a composite shape is the geometric center of that shape. It is the point where the shape would balance perfectly if it were made of uniform density material.

Lami's theorem is a principle that states that for a system of three forces acting at a point in equilibrium, each force is proportional to the sine of the angle between the other two forces. This theorem applies to coplanar concurrent force systems.

The method of joints is a technique used to analyze trusses by examining the forces acting at each joint of the truss. The forces are considered in equilibrium at each joint, allowing for a solution of all forces within the truss.

The method of sections is a technique used to analyze trusses by cutting through the truss and analyzing the forces acting on the cut section. The forces are considered in equilibrium on the cut section, allowing for a solution of internal forces.

D'Alembert's principle is a statement that converts a dynamic problem to a static one by introducing inertial forces. It is used to analyze motion of rigid bodies with constant acceleration.