Tension
Stretching force
The Resistance force is the nail that is being pulled up My silly dear child, you.
The atoms in the metal behave like tiny springs which are being pulled apart a little bit and also laterally displaced. The greater this separation, the greater the restoring force pulling the atoms back together.
First picture wave motion--the wave starts at the middle, rises upwards to its crest, then downward, past the middle until reaching the extreme bottom, the trough. A spring follows the same motion pattern. When a spring is in equilibrium, there is no motion, the spring is at the middle point. If you were to start motion on the spring by vibrating the mass, the spring would be displaced from equilibrium. Picture the spring moving past the middle, to the left until in cannot be compressed any further (like the crest) and moves the other way. It will then pass the middle point and extend as far is it can (like the trough) before being pulled back towards the middle. This process will repeat until equilibrium is re-established. It will look very similar to wave motion, identical if a ideal spring were used (a spring where all energy is conserved).
Kinetic friction.
Stretching force
Tension
Tension
Tension
Springs exhibit a physical property known as elasticity. This property allows it to be pushed and pulled easily despite often being made of rather tough materials, because minimal amounts of the material in the spring are actually being pulled and pushed on, but the whole is still moving drastically.
Softball is one sport being pulled.
Gravitation keeps the planets from being pulled into the Sun.
Stretching doesn't make you tired, it's actually the opposite. Stretching is your body's reaction to being tired, stretching is its way of trying to put your muscles to work and wake you up.
Static stretching, also known as static stretching.
1. The ability to recover quickly from illness, change, or misfortune; buoyancy.2. The property of a material that enables it to resume its original shape or position after being bent, stretched, or compressed; elasticity.
The Resistance force is the nail that is being pulled up My silly dear child, you.
Nothing keeps them from being pulled. Earth's gravity certainly pulls on them.