![]() ![]() Note that has the unit of Newton, and the unit vector has no dimension and unit. Where is the magnitude of the force and is the unit vector expressing the direction of. The length of an arrow representing a force vector can be proportional to the vector’s magnitude following some scale.ĭenoting a force vector as, we can write, This graphical representation is by the means of an arrow as discussed in Section 2.2. We can also have a graphical representation of a force vector. This unit vector shows the direction in the (geometrical) space. The direction of a force vector can be expressed using a unit vector. A force vector has the dimension, being equal to in the SI unit system (see Section 1.2). ![]() Calculations regarding forces follow the concepts and methods presented in Chapter 2. In this regard, the terms force and force vector are equivalent. Physically, force has a magnitude and a direction in the space, and therefore, it is a vector quantity called the force vector. Forces arise from different sources/causes like gravity, contact forces between bodies, pressure force by fluids on surface of solids, friction forces, electrostatic forces on charged particles, etc. In general, force is perceived as push or pull. Open Educational Resources Forces and Moments: Relationships between Load, Shear, and Moments.Shear and moment equations and their diagrams.Conditions for two dimensional rigid-body equilibrium.Equilibrium of Particles and Rigid Bodies. ![]()
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