FORCES AND STATICS
B. SECTION PROPERTIES
C. TRUSS ANALYSIS
D. BEAM ANALYSIS
simplest way to define a force is by just thinking of pull or push. More
generally, force is defined as an action that tends to disturb a body.
This disturbance can be thought of as translation, rise, fall, rotation,
spinning, and so forth.
Consider a block resting on a table. Connect a cable to the block and start pulling the block. If the right amount of force is applied, the block will start to move. The amount of movement obviously depends on the amount and duration of the applied force. The force can be applied directly to a body, such as pulling a car using a towrope, or indirectly, such as gravitational force. Gravitational force is the force the earth exerts on objects that pulls them toward its center. This force is known as the weight of the object and can be obtained by using a weighing scale.