Physics Force & Motion DUHS 2023
PMDC Verified Question 47 of 137
In the projectile motion, the acceleration in the horizontal direction:
A
Remain same
B
Varies with time
C
Is zero
D
Is positive
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Is zero
Concept:

Projectile motion separates into two independent axes. Gravity only pulls vertically downward.

Solution:

  • Since gravity acts strictly along the y-axis, there is absolutely no force acting along the x-axis.


  • \( F_x = 0 \implies a_x = 0 \).


  • Therefore, the horizontal acceleration is permanently zero.


Why other options are incorrect:

While technically "Remain same" (remaining at zero) is true, "Is zero" is the strict, exact, and correct physical descriptor.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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