Question

two masses 8kg and 2kg are 18 cm apart. The point where the gravitational field due to the masses is zero is

Answer 1

Net gravitational field will be zero at point X if the gravitational field due to the 2 bodies are equal and opposite in direction. So, on equating the fields due to the 2 bodies at point X. we can calculate the distance from the bodies where net gravitational field is zero.