What term describes the minimum speed an object must reach to break free from a planet’s gravitational pull without further propulsion, such as the roughly 11.2 kilometers per second required to leave Earth?

Explanation

Escape velocity is the minimum speed an object needs to break completely free from a planet’s gravitational pull without any further propulsion, and for Earth this value is approximately 11.2 kilometers per second. This value depends on the mass of the celestial body and the distance from its center, which is why the escape velocity required to leave a much smaller body, like the moon, is significantly lower than that required to leave Earth. Spacecraft intended to travel beyond Earth’s immediate vicinity must reach or exceed this speed, typically achieved through the combined thrust of powerful multi-stage rockets. Explore more Everyday Science MCQs on mcqstutor to keep practicing.