NEET Physics Question - Kinematics - Ground to Ground Projectile

Assertion (A): In projectile motion, speed always decreases.

Reason (R): In presence of air drag, projectile motion is a uniformly accelerated motion.

(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): In ideal projectile motion, speed decreases on the way up and increases on the way down, reaching a minimum at the peak. It does not always decrease. So (A) is False.
Reason (R): In the presence of air drag, the drag force depends on velocity, making the net acceleration non-constant. Thus, it is not uniformly accelerated motion. So (R) is False.
Since both (A) and (R) are false, option (4) is correct.

Rankers Physics

Projectile Motion – Speed and Air Drag

Solution:

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