Engineering Statics

Friction

End of chapter exercises for Engineering Statics: Open and Interactive 

Homework set.  Identify zero force members and utilize special loading conditions to simplify trusses.

Friction

Friction

Homework set.  Find statically equivalent systems of forces.

Replace two parallel forces with an equivalent single force

Replace three tangential forces with an equivalent force-couple system acting at the center of a circle.

Find the centroid of a shape made up of a rectangle and two triangles.

Homework set.  Find centroids of shapes by dividing them into simple subshapes.

Friction

Homework set.  Find reactions for various 2-D rigid bodies in equilibrium.

Find the reactions of a rigid body (a triangular plate) at a pin and roller.  The load is at an angle.

Homework set.  Find reactions for various 2-D rigid bodies in equilibrium.

Find the tensions is a system of cables supporting two loads.

Homework set.  Problems involving two interacting particles.

Classic machine problem.  Find the mechanical advantage of a pair of pliers and the force on the hinge pin.

Simple truss with a zero-force member

Homework set.  Trusses solved using the method of sections

Homework set.  More frame and machine problems.

Homework set.  Frame and machine problems.

An A-frame structure supporting a load at the top.  Simple because both legs are two force bodies.

Homework set.  Frame and machine problems.

Find all forces on a two-part, symmetrical frame supporting a load. 

This just an equilibrium of a particle problem, but posed in context of a joint as a warm-up for the method of joints.

Advice is brief.

Derive the expressions for the shear and bending moment as functions of $x$ for a cantilever beam with a uniformly varying (triangular) load.

Determine expressions for internal shear and bending moment as a function of $x$ for a beam with two vertical loads.

Determine the mechanical advantage of a pair of compound lopping shears.