Signs and symptoms. 1  Pain on the outer side of the thigh, occasionally extending to the outer side of the knee, usually constant. 2  A burning sensation, tingling, or numbness in the same area. 3  Multiple bee-sting like pains in the affected area. 4  Occasionally, aching in the groin area or pain spreading across the buttocks.
And the reason they don't is because of the strong nuclear force. In physics, there are four fundamental forces: gravity, the electromagnetic force, the weak force, and the strong force. The strong force is, unsurprisingly, strong. The strong force is the force that holds the nucleus of the atom together, even through other forces want to pull it apart. The electrostatic repulsion (part of the electromagnetic force) between the positive protons in the nucleus is very powerful.
Pound Force : The pound-force, or pound is a unit of force in some systems of measurement including British engineering units and British gravitational units. It is equal to the gravitational force exerted on a mass of one avoirdupois pound on the surface of Earth. Its symbol are lb, lbf, and lbf.