NEET Physics Question - Kinematics

Assertion (A): If initial velocity is negative and acceleration is positive then motion is retarded (initially).

Reason (R): If initial velocity is negative but acceleration is positive then displacement of a particle can never be positive.

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

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

(3) (A) is true but (R) is false

(4) Both (A) and (R) are false

Solution:

Assertion (A) is true because if velocity and acceleration have opposite signs (negative velocity, positive acceleration), the object is slowing down (retarding) initially.

Reason (R) is false. An object with negative initial velocity and positive acceleration can eventually reverse direction and achieve positive displacement (e.g., if it starts at \(x=0\), it will eventually cross \(x=0\) and move to positive \(x\)).

Thus, (A) is true, (R) is false.

Rankers Physics

Retarded Motion and Displacement

Solution:

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