Gravitation practice focused on fields, potentials, satellites, escape speed and orbital energy. Every preview below comes from NeetVellum's live original bank—not an unverified PYQ reconstruction.
fields, potentials, satellites, escape speed and orbital energy.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 1 · difficulty 2/5
The escape speed from the surface of the Earth is 11.2 km s⁻¹. Another planet has the same mean density as the Earth but its radius is half that of the Earth. The escape speed from the surface of this planet is:
A. 22.4 km s⁻¹
B. 11.2 km s⁻¹
C. 5.6 km s⁻¹
D. 2.8 km s⁻¹
Example 2 · difficulty 1/5
A planet orbits the Sun at a mean distance of 4 AU. Taking the Earth's orbital period as 1 year, the period of revolution of this planet is:
A. 8 years
B. 2 years
C. 16 years
D. 4 years
Example 3 · difficulty 3/5
If g is the acceleration due to gravity at the surface of the Earth (assumed uniform density, radius R), then at what depth below the surface does the value of g become g/4?
A. R/4
B. R/2
C. 2R/3
D. 3R/4
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.