a particle weighs 120N on the surface of earth at what height above earths surface will its weight be - Science - Gravitation

Question

a particle weighs 120N on the surface of earth at what height above
earths surface will its weight be 30N radius of earth =6400km

Vara · Accepted Answer

Ratio of weight:W'W=mg'mg       =g'gBut,g'g=RR+h2Hence,W'W=RR+h230120=64006400+h214=64006400+h212=64006400+h12800=6400+hh=6400 kmAns: 6400 km

a particle weighs 120N on the surface of earth .at what height above earths surface will its weight be 30N .radius of earth =6400km