Calculate the force of gravity on a 69.29-kg mass at the Earth's surface. The mass of the Earth is 6E24 kg, and the its radius is 6.4E6 m. ( 6E24 kg can also be written as 6 X 1024 kg.) (The unit of measure for the Force is the newton, written as N.) (The universal gravitational constant is G = 6.67E-11 Nm2/kg2.)