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Mini-Quiz: Gravitational Escape Velocity

by Ron Kurtus (revised 23 January 2018)

Take this Mini-Quiz to check your understanding of the lesson material.

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1. Why is determining the escape velocity from the surface of the Earth invalid?

Gravity is much greater at the surface of the Earth

The object cannot instantaneously reach the escape velocity

It is valid if you set R = 0

2. How does the escape velocity change if you double the mass of the rocket?

The escape velocity doubles

The rocket is then unable to escape

Escape velocity is independent of the mass of the rocket

3. If a star had twice the mass of the Sun and twice the radius, how would its escape velocity at a given altitude compare?

The star's escape velocity would be twice as large

The escape velocities would be the same

The star's escape velocity would be half as large

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.

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Do quality work

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Resources and references

The following resources can be used for further study on the subject.

Web sites

What is escape velocity? - From PhysLink

Escape Velocity - From Wikipedia

Gravitation Resources

Books

(Notice: The School for Champions may earn commissions from book purchases)

Top-rated books on Escape Velocity and Space Travel

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Questions and comments

Do you have any questions, comments, or opinions on this subject? If so, send an email with your feedback. I will try to get back to you as soon as possible.

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Where are you now?

School for Champions

Gravitation topics

Mini-Quiz: Gravitational Escape Velocity

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Gravity and Gravitation

• Overview of Gravity and Gravitation

Gravitation topics

• Overview of Gravitation
• Direction Convention
• Gravitation Resources

Theories

• Theories of Gravitation
• -- Law of Universal Gravitation
• ---- Universal Gravitation Equation
• -- Relativity Theory of Gravitation
• -- Quantum Theory of Gravitation
• Effect of Dark Matter and Dark Energy
• Gravitation as a Fundamental Force

Principles

• Equivalence Principles of Gravitation
• -- Weak Equivalence Principle
• -- Inertial and Gravitational Mass
• -- Strong Equivalence Principle
• Gravitation and Electrostatics
• Gravitational Speed
• Gravitational Potential Energy

Applications

• Gravitational Force Between Two Objects
• Attraction Between People
• Cavendish Experiment
• Cavendish Experiment Derivation
• Influence of Gravitation in the Universe
• Gravitation Causes Tides on Earth

Center of Mass

• Gravitation and Center of Mass
• Center of Mass Definitions
• CM Location and Motion
• Relative Motion and CM
• CM Motion Components
• CM and Radial Motion
• CM and Tangential Motion

Orbital motion

• Orbits Around CM
• Orbital Motion Relative to Another Object
• Circular Planetary Orbits
• Length of Year for Planets in Orbit
• Effect of Velocity

Escape velocity

• Gravitational Escape Velocity
• -- Escape Velocity Derivation
• Escape Velocity with Saturn V Rocket
• Effect of Sun on Escape Velocity
• Escape Velocity from a Black Hole

Gravity

• Gravity topics
• Overview of Force of Gravity

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