The weakest of all fundamental forces is –

Solution

In particle physics, fundamental interactions(sometimescalledinteractiveforces or fundamental forces) are the ways that elementary particles interact with one another. Aninteractionisfundamentalwhenitcannotbe describedintermsofotherinteractions.Thefour known fundamental interactions are electromagnetism, strong interaction ("strong nuclearforce"),weakinteraction("weaknuclear force"), and gravitation. All are non-contact forces.