WBCS.LIVE practice question

What is the escape velocity from the Earth's surface?

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 break free from a planet's gravitational pull without further propulsion. For Earth, this value is approximately 11.2 kilometers per second (about 25,000 mph). If an object is launched at this speed or higher, it will travel away from Earth indefinitely. The escape velocity depends on the mass and radius of the celestial body; for example, the Moon's escape velocity is much lower (2.4 km/s).