Rankers Physics

Definition of Force Inertia and First Law: Practice Problem & Solution

Generally it is said "Normal reaction always acts perpendicular to the surface of contact" :
The statement is always correct
The statement is some times correct
The statement is correct
I can not comment, the way you have designed the question made me speech less.

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Definition of Force Inertia and First Law. Understanding the underlying formula is key to arriving at the correct answer below:

Normal reaction force is always normal ( Perpendicular ) to the surface.  

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