2018 source guide · Physics

NEET 2018 Physics Rotational Motion Questions

Use this page to connect the official 2018 paper with current Physics practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.

Practice 138 verified questions →Check official NTA archive ↗

What to master

centre of mass, torque, angular momentum, rolling and moment of inertia.

Original practice preview

These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.

Example 1 · difficulty 2/5

A thin circular ring and a uniform disc have equal masses and equal radii. The ratio of the radius of gyration of the ring to that of the disc, each taken about its own central axis perpendicular to its plane, is:

A. √2 : 1
B. 1 : √2
C. 1 : 2
D. 2 : 1

Example 2 · difficulty 4/5

A horizontal disc rotates freely about a vertical frictionless axis with angular speed ω. An identical disc, initially non-rotating, is gently dropped onto it coaxially; friction between the discs soon makes them rotate together. The fraction of the initial rotational kinetic energy dissipated during this process is:

A. 25%
B. zero
C. 75%
D. 50%

Example 3 · difficulty 1/5

Two particles of masses 2 kg and 3 kg are at x = 0 m and x = 10 m. The x-coordinate of their centre of mass is:

A. 6 m
B. 4 m
C. 5 m
D. 8 m

The evidence-first practice loop

1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
2. Attempt closed-bookExpose the concept or execution gap before rereading.
3. Repair and returnClassify the miss and re-practice after a delay.

Canonical chapter practice

System of Particles and Rotational Motion →

Frequently asked questions

Are these official NEET 2018 Physics Rotational Motion PYQs?

No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.

How should I use the NEET 2018 paper?

Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.