Answer-The weakest of all fundamental forces is –

In particle physics, fundamental interactionssometimescalledinteractiveforces 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,weakinteractionweaknuclear force, and gravitation. All are non-contact forces.