# Force And Pressure

Get Started. It's Free Force And Pressure ## 1. A Force Can

### 1.2. Change the shape of an object

1.2.1. Plasticine

## 2. Examples of Force

### 2.1. Frictional force

2.1.1. Advantages of frictional force

2.1.1.1. friction between our hands and an object helps us to hold it.

2.1.1.2. friction between two stones/wood can create a fire

2.1.1.3. friction between the brakes and the wheels helps to slow down the bicycle.

2.1.2. Disadvantages of frictional force

2.1.2.1. Causes wear and tear

2.1.2.1.1. Tyres

2.1.2.1.2. Soles of a shoe

2.1.2.2. Slows does the speed of animals/objects in the water and in the air

2.1.3. What is friction?

2.1.3.1. Friction Opposes motion

2.1.3.2. Friction slows down the speed of a moving object or stops it.

2.1.3.3. Friction happens whenever two moving surfaces are in contact

2.1.3.4. Friction Produces heat

### 2.2. Gravitational Force

2.2.1. What is gravitational force?

2.2.1.1. Gravitational force pulls all objects towards the Earth.

2.2.1.2. The weight of an object depends on the force of gravity pulling on the object.

2.2.1.3. The greater the force of gravity pulling on an object, the heavier the weight of an object.

### 2.3. Magnetic Force

2.3.1. What is magnetic force

2.3.1.1. The force which a magnet exerts to attract a magnetic object is called a magnetic force.

2.3.1.2. Like poles of a magnet repel while unlike poles of a magnet attract

## 4. Pressure

### 4.2. Factors affecting Pressure

4.2.1. Area

4.2.1.1. The larger the area,the lower the pressure

4.2.2. Force

4.2.2.1. When more force is exerted,the higher the pressure