The binding energy of a nucleus is the amount of energy needed to .

The binding energy of a nucleus is the amount of energy needed to disassemble the nucleus.

Explanation:

The binding energy is defined as the amount amount of energy spent to separate particles from the system of particles. It is also called as separation energy.

The binding energy can be used to separate electron from  nuclei in atoms, to ions and atoms in crystals.

The nuclear binding energy is the minimum amount of energy required to separate the nucleus into its components.The components of nucleus are proton and neutrons . The proton and neutron together is called as nucleons.

The nuclear binding energy is very much greater than electron binding energy  of the lighter atoms.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards