Can a human destroy a Dalek?

Answer 1

Daleks are not invulnerable. The right kind of weaponry can destroy them easily, it's just they tend to be in too great a number in places where such weaponry is available, and in places where no such weapons exist when they are in smaller numbers.

So a human with such a weapon is capable of destroying a Dalek. Jack Harness does, so does Rose Tyler, Jackie Tyler and Mickey Smith.

One took a good beating from the Doctor using a heavy object, which didn't even leave a mark. So on the other hand, they're too sturdy to be damaged by a human's raw strength alone, even with a melee weapon.