Do you support trucks are identical each box loaded on the truck has the same mask choose the truck that has the greatest force of gravity acting on it?

gravitational force of earth is given by

so here the force will depend on the product of mass and gravity

so here force will be more if we took the condition of more masses

so here in 3rd figure

there will be maximum force of gravity on it

because it will have 6 boxes so there will be maximum mass

So figure of truck with 6 boxes on it is correct answer

the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary 

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it