Question

An object dropped from rest almost infinitely far from earth falls to earth because of earth's gravitational field, and strikes the surface with a speed of about _____.

a. 8 km/s
b. 9.8 m/s
c. 11 km/s
d. none of the above

Answer 1

B.) With a speed about 9.8 m/s which is gravitational field of earth.. that we know by the name of "Gravity".

Answer 2

It's about 11.2 km/s ... what we would call 'escape velocity' if we run the same situation backwards.