# How do you calculate drag force?

## How do you calculate drag force?

The drag equation states that drag D is equal to the drag coefficient Cd times the density r times half of the velocity V squared times the reference area A. For given air conditions, shape, and inclination of the object, we must determine a value for Cd to determine drag.

What is drag force GCSE physics?

Drag forces are forces acting the opposite direction to an object moving through a fluid (either gas or liquid) Examples of drag forces are friction and air resistance.

### What is V in the drag force equation?

The Drag Force Equation The pressure on an object moving through a fluid can be expressed as (1/2) ρv, where ρ (the Greek letter rho) is the density of the fluid and v is the object’s velocity.

What is drag force?

Drag is a mechanical force. It is generated by the interaction and contact of a solid body with a fluid (liquid or gas). It is not generated by a force field, in the sense of a gravitational field or an electromagnetic field, where one object can affect another object without being in physical contact.

#### How do you calculate the drag force of a falling object?

The net external force is equal to the difference between the weight and the drag forces (F = W – D). The acceleration of the object then becomes a = (W – D) / m . The drag force depends on the square of the velocity. So as the body accelerates its velocity (and the drag) will increase.

What is drag force BBC Bitesize?

Drag is the force which acts against the movement on an object when it moves through a fluid (a liquid or gas). The faster the object moves the more drag it experiences. When the fluid is air, drag is usually described as air resistance .

## How do you calculate the drag force of A falling object?

Why is there A 1/2 in the drag equation?

The half 12 that also appears in the equation, is – as others also point out – due to the drag coefficient Cd being neatly written as Cd=DAq, where q=12ρv2 is the dynamic pressure, an important aerodynamic property.

### How do you calculate B in drag force?

We find vterminal = d/t and then use vterminal = mg/b to solve for b. Details of the calculation: vterminal*(12 s) = 0.6 m, vterminal = 0.05 m/s. vterminal = mg/b, b = mg/vterminal.

How do you find the drag force of a falling object?

The net external force is equal to the difference between the weight and the drag forces (F = W – D). The acceleration of the object then becomes a = (W – D) / m . The drag force depends on the square of the velocity.

#### Why is there a 1/2 in the drag equation?

What is an example of a drag force?

Drag forces, of which air resistance is one example, are gen- erally important when a solid object moves through a fluid, either a liquid or gas. Other examples include a bicyclist riding a bike, a boat moving through water, or the analytical technique of electrophoresis.

## What is drag force ks3?

What is drag GCSE?

Air resistance (or drag), is a resistive force that acts against objects that are moving through the air. Drag acts on objects moving through any fluid (gas or liquid) – and is larger in liquids.

### What is B in drag equation?

So, the shape of the object influences the value of “b”, the density of the fluid influences “b”, and so on. This means that we can write the air resistance force (or drag force) as fdrag = bv for very small, slow objects, or fdrag = bv2 for “human-size objects, depending on the situation.

What is V in F =- BV?

I saw that the equation F=-bv is used for the drag force for damped harmonic motion, where F is the drag force, v is the velocity of the hanging mass.