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GS Paper IUPSC Prelims 2004
Health & Medicine
Question No. 217Interactive Test Mode
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+2-0.66

Q217. A car is running on a road at a uniform speed of 60 km/h. The net resultant force on the car is:

A car is running on a road at a uniform speed of 60 km/h. The net resultant force on the car is:

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2004 • Science and Technology

Correct Answer: Option (D) — equal to zero.

Concept & Option Breakdown

Standard Reference Verified

According to Newton's First and Second Laws of Motion, if an object moves with uniform velocity (constant speed in a straight line), its acceleration is zero ($a = 0$). Since $F_{\text{net}} = ma$, the net resultant external force acting on the car must be zero. The driving force generated by the engine is precisely balanced by resistive forces (air drag and rolling friction).

Elimination Heuristic & Exam Approach

Uniform motion $\implies a = 0 \implies F_{\text{net}} = 0$.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2004 (Q217)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (D) — equal to zero.

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Frequently Asked Questions — UPSC Prelims 2004 Q217

What is the official answer for UPSC Prelims 2004 GS Paper I Question 217 (Science and Technology)?

The official UPSC answer key for this 2004 Science and Technology (Health & Medicine) question is Option (D): "equal to zero.". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2004 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Health & Medicine UPSC Prelims question using option elimination?

Uniform motion $\implies a = 0 \implies F{\text{net}} = 0$.

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