Final answer:
Escape velocity is the speed needed to overcome the gravity of an object or group of objects. It depends on the mass and radius of the object. It is the minimum speed required for an object to escape the gravitational pull of that object.
Step-by-step explanation:
Escape velocity is the speed needed to overcome the gravity of an object or group of objects. It depends on the mass of the object and the distance from its center. The formula to calculate escape velocity is:
v = sqrt((2 * G * m) / r)
Where:
- v is the escape velocity
- G is the gravitational constant
- m is the mass of the object
- r is the distance from the center of the object
For example, the escape velocity from Earth is 11.2 km/s, which means that a rocket leaving Earth's surface needs to reach at least that speed to escape Earth's gravity and reach other celestial bodies.
In conclusion, escape velocity depends on the mass and radius of the object. It is the minimum speed required for an object to escape the gravitational pull of that object.