NEET Physics Question - Laws of Motion

Assertion (A): The contact force is the net force applied by the surface on the body kept on it.

Reason (R): When a body is at rest on a horizontal surface then the contact force on the body by the surface must be equal to the weight of body.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true: contact force is the resultant of normal and friction forces from the surface. Reason (R) is true: for a body at rest on a horizontal surface, contact force magnitude is equal to \(mg\). (R) is a specific case, not a general explanation of (A)'s definition.

Rankers Physics

Contact Force Definition

Solution:

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