# What is Q in VQ it?

**q**=

**VQ**. I. where V = the shear force at that section;

**Q**= the first moment of the portion of the area (above the horizontal line where the shear is being calculated) about the neutral axis; and I = moment of inertia of the cross-sectional area of the beam. The quantity

**q**is also known as the shear flow.

Also question is, what is Q in shear stress?

In a Nut Shell: **Q** is the first moment of the area between the location where the **shear**. **stress** is being calculated and the location where the **shear stress** is zero about the. neutral (centroidal) axis. See the figure below.

Similarly, what is the formula for shear force? The **formula for shear stress** is tau = F / A, where 'F' is the applied **force** on the member, and 'A' is the cross-sectional area of the member.

Accordingly, how do you find q first moment of area?

The statical or **first moment of area** (**Q**) simply measures the distribution of a beam sections's **area** relative to an axis. It is calculated by taking the summation of all **areas**, multiplied by its distance from a particular axis (**Area** by Distance).

What do you mean by shear force?

**shear force**. A **force** acting in a direction parallel to a surface or to a planar cross section of a body, as for example the pressure of air along the front of an airplane wing. **Shear forces** often result in **shear** strain. Resistance to such **forces** in a fluid is linked to its viscosity. Also called **shearing force**.