Contact Forces

Types of Force

Contact Force:-

The forces which act on bodies when they are in physical contact with each other are called the Contact forces. Example - muscular force, friction force.

Non-Contact Force:-

The forces experienced by bodies even without being physically touched are called the Non-Contact Forces. Examples - electrostatic force, gravitational force and magnetic force.

CONTACT FORCE

• The force that comes into action after the interaction between objects is called contact force.
• Contact force works on the point of contact.
• Example - pushing a car, hitting the ball, kicking a ball, etc.

Muscular force, Friction Force are types of Contact Force.

1. Muscular Force

The force that comes into play because of the action of muscles is called muscular force.

 For example:

• Human beings use muscular force in order to walk.
• The expansion and contraction of the lungs is because of muscular force
• Movement of food along the food pipe
• Animals can also exit muscular forces; that's why they can move from one place to another
• Pushing the object like a school bag or lifting the dumbles for exercising
• we use the muscular force.

2. Friction Force:

• Forces of friction arise between the surfaces of two objects.
• Always acts on all moving objects and its direction is always opposite to the direction of motion.
• The Force of the friction comes into action only after interaction between two objects, thus, it is a type of contact force.
•  It is the force that is exerted by the surface over an object whenever the object moves on the surface.

Force of friction has the following characteristics:

• The force of friction always acts in the opposite direction of the motion of the object.
• It leads to the generation of heat as two surfaces come in contact with each other. For example, when we rub our hands together, heat is produced as a result of friction between our hands.

The frictional force also leads to wear and tear of the surfaces of objects that come in contact with each other. For example, the sole of shoes often gets worn out due to friction force that acts between them and the ground as we walk

Example: Due to the force of friction between the surface of the ball and the ground that brings the moving ball to rest.