WBCS.LIVE practice question

What is the escape velocity required for an object to break free from the Earth's gravitational pull?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. 9.8 km/s
  2. 11.2 km/s
  3. 7.9 km/s
  4. 42.1 km/s

Correct answer and explanation

Correct answer: 11.2 km/s

Explanation: āœ… Correct Answer: B) 11.2 km/s šŸ“š Explanation: Escape velocity is the minimum speed an object must reach to escape the gravitational field of a celestial body without further propulsion. For Earth, this value is approximately 11.2 km/s (or about 25,000 mph). This speed depends only on the mass and radius of the planet and is independent of the mass of the escaping object.