The normal reaction is the force which perpendicular to the surface like the gravity pulls downward and we stand at our position due to normal reaction force and tension force is like when a pulley tight by a rope and we pull the rope the force between the rope and pulley is tension force
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Normal Reaction Force vs Tension Force

Understanding the differences between normal reaction force and tension force is crucial in the study of mechanics. Both forces play significant roles in various physical phenomena, but they act in different ways and have distinct characteristics.

Normal Reaction Force:
- Normal reaction force is the force exerted by a surface to support the weight of an object placed on it.
- It acts perpendicular to the surface and prevents objects from passing through each other.
- This force is present whenever an object is in contact with a surface and is essential for stability and equilibrium.
- The magnitude of the normal reaction force is equal and opposite to the force exerted by the object on the surface due to gravity.
- It is a fundamental force in mechanics and is crucial in analyzing the dynamics of objects resting on surfaces.

Tension Force:
- Tension force is a pulling force transmitted through a string, rope, cable, or any other type of flexible connector.
- It acts along the length of the connector and is always directed away from the object to which it is attached.
- Tension force is present in situations where objects are connected by a flexible medium and are being pulled or suspended.
- The magnitude of the tension force is equal throughout the connector and is determined by the forces acting on the objects at each end.
- It is commonly encountered in scenarios involving hanging masses, pulley systems, and bridges.

In summary, the key difference between normal reaction force and tension force lies in their direction of action and the scenarios in which they are present. Normal reaction force acts perpendicular to a surface to support an object's weight, while tension force acts along a flexible connector to transmit pulling forces. Both forces are essential in understanding the mechanics of objects in different physical situations.