The acceleration due to gravity near the earth's surface is 9.8 metre per second square the earth radius is 6400 m km from this data calculate the mass of the earth.
a) Approximately 5.972 × 10²⁴ kg
b) Approximately 6.371 × 10⁶ kg
c) Approximately 5.972 × 10³⁰ kg
d) Approximately 9.8 m/s²