# Forces and Structure

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Forces and Structure

## 1. Types of Structures

### 1.1. Solid Structures

1.1.1. An object that uses solid material to support loads and itself.

### 1.2. Frame Structures

1.2.1. A structure that uses a skeleton of materials to support each other.

### 1.3. Shell Structures

1.3.1. A hollow structure with a curved shape.

### 1.4. Combination Structures

1.4.1. A structure that uses all the other structures in one object. (Solid, Frame and Shell in one object)

## 2. Types of Forces

### 2.1. External Forces

2.1.1. A force that acts on an object from the outside.

2.1.1.1. Point of Application

2.1.1.1.1. Point of Application is the point where the object is being pushed or pulled.

2.1.1.2. Magnitude

2.1.1.2.1. Magnitude is how strong the force is.

2.1.1.3. Direction

2.1.1.3.1. Direction is whether the force is a push or a pull.

2.1.1.4. Plane of Application

2.1.1.4.1. Plane of Application is the angle in which the force is applied

### 2.2. Internal Forces

2.2.1. A force that acts on an object within the materials that created the structure.

2.2.1.1. Compression

2.2.1.1.1. An internal force that causes an object to be pressed down on.

2.2.1.2. Shear

2.2.1.2.1. An internal force that causes an object to bend or break in half.

2.2.1.3. Tension

2.2.1.3.1. An internal force that causes an object to be pulled apart.

2.2.1.4. Torsion

2.2.1.4.1. An internal force that causes a rotational force to an object.

3.1.1.1. A load that is caused by the weight the object supports.

3.1.2.1. A load that is caused by the weight of the structure itself.

## 5. Function and Form

### 5.1. Form

5.1.1. The function is how the object looks like/ The design of it.

### 5.2. Function

5.2.1. Form is how the object works and what the features of it is. The function is needed for the form to work.