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Mind Map: Gravitation
The document Mind Map: Gravitation is a part of the NEET Course Physics Class 11.
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FAQs on Mind Map: Gravitation
| 1. What is Newton's law of universal gravitation and how does it explain why objects fall? |  |
Ans. Newton's law of universal gravitation states that every mass attracts every other mass with a force proportional to the product of their masses and inversely proportional to the square of the distance between them. This gravitational force is what pulls objects toward Earth, causing them to fall downward regardless of their size or weight.
| 2. How do you calculate gravitational force between two objects using the gravitation formula? | |
Ans. Gravitational force is calculated using F = GMm/r², where G is the gravitational constant (6.67 × 10⁻¹¹ N·m²/kg²), M and m are the masses of the two objects, and r is the distance between their centres. Simply substitute the values into this equation to find the attractive force between any two masses in the universe.
| 3. What's the difference between gravitational potential energy and gravitational potential? | |
Ans. Gravitational potential energy is the total energy an object possesses due to its position in a gravitational field, calculated as PE = -GMm/r. Gravitational potential, however, is the potential energy per unit mass at a location, expressed as V = -GM/r. Both decrease with distance but measure different quantities in gravitation problems.
| 4. Why does Earth's gravity weaken as you move farther away, and how does this relate to orbital motion? | |
Ans. Earth's gravitational force follows the inverse square law-doubling your distance reduces gravitational attraction to one-quarter. This weakening force is precisely what keeps satellites and the Moon in stable orbits; the reduced gravity provides the centripetal acceleration needed for circular orbital motion around Earth without the object escaping into space.
| 5. Can you explain what escape velocity means and why it matters for space missions? | |
Ans. Escape velocity is the minimum speed an object needs to break free from a celestial body's gravitational pull without further propulsion, calculated as v = √(2GM/r). For Earth, this equals approximately 11.2 km/s. Space missions use this concept to determine the energy required for rockets to leave planetary orbits and explore deep space.
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Document Description: Mind Map: Gravitation for NEET 2026 is part of Physics Class 11 preparation. The notes and questions for Mind Map: Gravitation have been prepared according to the NEET exam syllabus. Information about Mind Map: Gravitation covers topics like and Mind Map: Gravitation Example, for NEET 2026 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Mind Map: Gravitation.
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