Force Systems Introduction Definition Concurrent Force Systems A

Introduction - Definition Concurrent Force Systems: A concurrent force system contains forces whose lines-of

Introduction - Definition Force exerted on a body has two effects: • The external

Introduction - Definition A force is a vector quantity that, when applied to some

Introduction - Definition Scalar Quantity has magnitude only (not direction) and can be indicated

Introduction - Definition Collinear : If several forces lie along the same line-of –action,

Coplanar : When all forces acting on a body are in the same plane,

Introduction - Definitions Types of Forces(Loads) 1. Point loads - concentrated forces exerted at

Force Components & Resultants Magnitude of FR can be found by Pythagorean Theorem 12/19/2021

General case: 12/19/2021 Dr. Nasrellah H A 12

Example 1: Determine the magnitude and direction of resultant. 12/19/2021 Dr. Nasrellah H A

Example 2: Determine the magnitude and direction of resultant. 12/19/2021 Dr. Nasrellah H A

Example 3 : 12/19/2021 Dr. Nasrellah H A 15

Example 4 : 12/19/2021 Dr. Nasrellah H A 17

Example 5 : 12/19/2021 Dr. Nasrellah H A 18

Example 6 : 12/19/2021 Dr. Nasrellah H A 20

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Force Systems

Introduction - Definition Concurrent Force Systems: A concurrent force system contains forces whose lines-of action meet at some one point. Forces may be tensile (pulling) 12/19/2021 Dr. Nasrellah H A 2

Introduction - Definition Concurrent Force Systems: A concurrent force system contains forces whose lines-of action meet at some one point. Forces may be compressive (pushing) 12/19/2021 Dr. Nasrellah H A 3

Introduction - Definition Force exerted on a body has two effects: • The external effect, which is tendency to change the motion of the body or to develop resisting forces in the body • The internal effect, which is the tendency to deform the body. 12/19/2021 Dr. Nasrellah H A 4

Introduction - Definition A force is a vector quantity that, when applied to some rigid body, has a tendency to produce translation (movement in a straight line) or translation and rotation of body. When problems are given, a force may also be referred to as a load or weight. Characteristics of force are the magnitude, direction(orientation) and point of application. 12/19/2021 Dr. Nasrellah H A 5

Introduction - Definition Scalar Quantity has magnitude only (not direction) and can be indicated by a point on a scale. Examples are temperature, mass, time and dollars. Vector Quantities have magnitude and direction. Examples are wind velocity, distance between to points on a map and forces. 12/19/2021 Dr. Nasrellah H A 6

Introduction - Definition Collinear : If several forces lie along the same line-of –action, they are said to be collinear. 12/19/2021 Dr. Nasrellah H A 7

Coplanar : When all forces acting on a body are in the same plane, the forces are coplanar. 12/19/2021 Dr. Nasrellah H A 8

Introduction - Definitions Types of Forces(Loads) 1. Point loads - concentrated forces exerted at point or location 2. Distributed loads - a force applied along a length or over an area. The distribution can be uniform or non-uniform. 12/19/2021 Dr. Nasrellah H A 9

Force Components & Resultants Magnitude of FR can be found by Pythagorean Theorem 12/19/2021 Dr. Nasrellah H A 10

Or : 12/19/2021 Dr. Nasrellah H A 11

General case: 12/19/2021 Dr. Nasrellah H A 12

Example 1: Determine the magnitude and direction of resultant. 12/19/2021 Dr. Nasrellah H A 13

Example 2: Determine the magnitude and direction of resultant. 12/19/2021 Dr. Nasrellah H A 14

Example 3 : 12/19/2021 Dr. Nasrellah H A 15

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Example 4 : 12/19/2021 Dr. Nasrellah H A 17

Example 5 : 12/19/2021 Dr. Nasrellah H A 18

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Example 6 : 12/19/2021 Dr. Nasrellah H A 20

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