A body weighs 90N at the surface of earth. What would be its weight at a height equal to half the radius of earth?
Answers
Answer:
first of all let's assume mass of body to be m and mass of Earth to M and since effect of rotation of earth is neglected ( because mass of of body is assumed to be almost negligible with respect to mass of Earth) therefore weight of the body must be equal to gravitational force of attraction acting between earth and mass and calculate gravitational force acting between body and the earth in each case and put the required value of the given weight of the body initially to get weight of the body when radius of earth is is half
( weight of the body is actually equal to the normal reaction exerted on the weight machine by the body which is equal to the normal reaction force exerted by Earth on the Mass therefore in the solution normal reaction is directly put equal to weight of the body)
