Escape Velocity and Orbital Speed MCQs
Escape Velocity and Orbital Speed MCQs
Class: CBSE Class 11
Subject: Physics
Section: Gravitation
Topic: Escape Velocity and Orbital Speed MCQs
Board: CBSE Board Examination (Strictly NCERT Based)
Subject: Physics
Section: Gravitation
Topic: Escape Velocity and Orbital Speed MCQs
Board: CBSE Board Examination (Strictly NCERT Based)
Q1. Escape velocity formula:
Answer: B
Explanation: Escape velocity Ve = √(2GM/R).
Explanation: Escape velocity Ve = √(2GM/R).
Q2. Orbital velocity formula:
Answer: A
Explanation: Orbital speed Vo = √(GM/R).
Explanation: Orbital speed Vo = √(GM/R).
Q3. Relation between escape & orbital velocity:
Answer: C
Explanation: Ve = √2 × Vo.
Explanation: Ve = √2 × Vo.
Q4. Escape velocity of Earth:
Answer: 11.2 km/s
Explanation: Standard Earth escape velocity.
Explanation: Standard Earth escape velocity.
Q5. Orbital speed near Earth surface:
Answer: 7.9 km/s
Explanation: Required for low Earth orbit.
Explanation: Required for low Earth orbit.
Q6. Escape velocity depends on:
Answer: Planet mass & radius.
Q7. Escape velocity independent of:
Answer: Object mass.
Q8. If Earth mass doubles Ve:
Answer: Increases √2 times.
Q9. If Earth radius doubles Ve:
Answer: Decreases.
Q10. Satellite acceleration equals:
Answer: Centripetal acceleration.
Q11. Orbital velocity decreases with:
Answer: Altitude.
Q12. Minimum energy orbit:
Answer: Circular orbit.
Q13. Escape velocity Moon:
Answer: 2.4 km/s.
Q14. Orbital speed independent of:
Answer: Satellite mass.
Q15. Energy in orbit:
Answer: Negative.
Q16. Escape velocity derived using:
Answer: Energy conservation.
Q17. Satellite stays due to:
Answer: Gravity.
Q18. Orbital period depends on:
Answer: Radius.
Q19. g decreases with height because:
Answer: Distance increases.
Q20. Geostationary satellite speed:
Answer: Lower than 7.9 km/s.
Q21. If velocity < orbital:
Answer: Satellite falls.
Q22. If velocity > escape:
Answer: Leaves planet.
Q23. Orbital KE =
Answer: GMm/2R.
Q24. Total orbital energy:
Answer: −GMm/2R.
Q25. Escape KE equals:
Answer: GMm/2R.
Q26. Rocket launch direction:
Answer: Eastward.
Q27. Artificial satellite path:
Answer: Elliptical.
Q28. Orbital motion is:
Answer: Continuous free fall.
Q29. Satellite weight in orbit:
Answer: Zero apparent weight.
Q30. Escape velocity dimension:
Answer: LT⁻¹.
