Statics Review

Question 1

Describe the principle of transmissibility.

Answer 1

Force is a sliding vector since it will create the same external effects on a body when it is applied at any point P along its line of action.

Hibbeler–Statics: Pg 168

Question 2

When a force is moved to another point P that is not on its line of action, it will create the same external effects on the body if _____.

Answer 2

A couple moment is also applied to the body.

Hibbeler–Statics: Pg 168

Question 3

What is a “concurrent force system?”

Answer 3

A system in which the lines of action of all the forces intersect at a common point.

Hibbeler–Statics: Pg 177

Question 4

For a concurrent force system, is there any moment about the point of intersection of all the forces?

Answer 4

No.

Hibbeler–Statics: Pg 177

Question 5

What is the equivalent force for a concurrent system?

Answer 5

A single resultant force which is the sum of all the forces acting on the system, and lies at the point of intersection of all the lines of action.

Hibbeler–Statics: Pg 177

Question 6

Define a “Co-planar Force System.”

Answer 6

A system in which the lines of action of all forces acting on the system lie in the same plane.

Hibbeler–Statics: Pg 177

Question 7

For a co-planar force system, the resultant force and resultant moment are _______.

Answer 7

Perpendicular.

Hibbeler–Statics: Pg 177

Question 8

What is a “parallel force system?”

Answer 8

A system in which forces are orthogonal to the body’s surface and parallel to each other.

Hibbeler–Statics: Pg 178