Escape Speed
Velocity or Escape speed is the speed of a body at which the total of the kinetic energy and gravitational potential energy is zero. The escape velocity from earth’s surface is about 11,186 m/s. In a different sense, it can be described as the speed required to break the gravitational attraction. The formula for escape speed is articulated as,
Where,
G is the gravitational constant
M is the mass of the planet
r is the distance from the centre of gravity.
Solved Example
Let us discuss some numerical on escape speed to learn more about this concept.
Example 1: The mass of the Jupiter is given as 1.898×1027Kg and the radius is given as 71492km. Compute the escape speed?
Answer:
Known parameters are,
Mass of the Jupiter, M = 1.898×1027kg
radius, r = 71492km
G = 6.673×10-11m3/kgs2
Formula for escape speed is,
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