Topic 2 ( Force and Classifications ) Flashcards
is a mechanical interaction between two bodies, influencing their motion, deformation, or both
Force
It plays a central role in mechanics and engineering, forming the basis for understanding and analyzing structures and materials.
Force
A vector quantity that represents the interaction between bodies, affecting motion or deformation.
Force
Result from physical interaction (e.g., friction, normal force).
Contact Force
Act over a distance without direct contact (e.g., gravitational, magnetic forces).
Field Forces
Act within a body or system, maintaining structural integrity.
Internal Forces:
: Act from outside the system, causing movement or deformation.
External Forces
Applied at a single point.
Concentrated Force
Forces that push or compress a body.
Compression
Spread over an area or volume (e.g., pressure, load distribution).
Distributed Forces
Forces that pull or elongate a body.
Tension
A force can be moved along its line of action without changing its external effect on a body.
Principle of Transmissibility
Force spread evenly across a length or area.
Uniformly Distributed Load
a load that increases or decreases at a constant rate from one end to the other end as shown.
Uniformly Varying Load
is a type of distributed load where the load intensity changes linearly along the length of the structure.
Uniformly Varying Load (UVL)
tells you that the ratio of a side of the triangle to the sine of its opposite angle is always the same for all three sides and angles in the triangle. This is helpful when you know either two angles and one side, or two sides and one angle, and you need to find the missing parts of the triangle.
Sine Law
is a principle in statics that deals with the resultant moment (or torque) of a system of forces. It simplifies how we calculate the moment of forces by using the concept of a force couple.
Varignon’s Theorem
simplifies the process of finding the resultant moment of a system of forces.
Varignon’s Theorem
is a formula used to calculate the length of a side or the measure of an angle in any triangle, not just right-angled ones. It’s especially useful when you know two sides and the angle between them, or all three sides, and want to find the missing part of the triangle.
Cosine Rule (also known as the Law of Cosines)
helps you find the resultant vector when you have two vectors acting at an angle to each other. The resultant is found by forming a parallelogram and drawing the diagonal.
Parallelogram Rule
