Escape speed from Earth is
A)8 km/s.
B)9.8 km/s.
C)11.2 km/s.
D)42.2 km/s.

Question

Quizplus · Accepted Answer

Escape speed is the minimum speed required to escape the gravitational pull of a planet or celestial body. It is given by the formula:

Escape speed = √(2GM/R)

where G is the universal gravitational constant, M is the mass of the planet, and R is the radius of the planet.

For Earth, this gives an escape speed of approximately 11.2 km/s. Therefore, the correct answer is (C).

Escape Speed from Earth Is