Equal and similar charges are placed on the earth and the moon. The numerical value of charge required to neutralise their gravitational attraction is (Given: mass of earth=6×1024kg, Mass of moon=7×1022kg) :
Define gravitational mass. The mass of the earth is 6×1024 kg and that of the moon is 7.4×1022 kg. If the distance between the earth and the moon be 3.84×105 km, calculate the force exerted by the earth on the moon. (G=6.7×10−11 Nm2kg−2) [3 MARKS]