Answer needed please help! but if there`s no gravity that would mean no vacuum? Why aren`t they related this is my actual doubt?what is the basis of explanation if according to you field lines do not exist physically but their effects can be felt? Eg. magnetic effect if it is being felt upto a distance of 100 m from a magnet that means it surely exists in between 0-100m. It means magnetic field lines are continuous and not discrete if it were ever possible for any kind of field!

Three identical balls are placed on a frictionless horizontal surface touching each other. They stick to each other because of adhesive. Another ball of same radius and mass m is placed over the void created by the three balls. Find the forces applied by the balls kept on the floor to each other if the system remains in equilibrium.

A car loaded with water having total mass 1000 kg moves on a straight horizontal Road starting from rest under the action of a force of 100 Newton. The water spills throw a small hole in the bottom at a rate of 0.1 KG per second the velocity of cart after 300 seconds is nearly.

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