The Total solution for NCERT class 6-12
What is the magnitude of the gravitationalforce between the earth and a 1 kg object on its surface? (Mass of the earth is6 × 1024 kg and radius of the earth is 6.4 × 106 m).
According to the universal law ofgravitation, gravitational force exerted on an object of mass m isgiven by:
Where,
Mass of Earth, M = 6 × 1024 kg
Mass of object, m = 1 kg
Universal gravitational constant, G = 6.7 ×10−11 Nm2 kg−2
Since the object is on the surface of theEarth, r = radius of the Earth (R)
r = R = 6.4 × 106 m
Gravitationalforce,