because it gets teird
stops rolling?
It stops working?
First, the pen rolling would be kinetic energy and then the overall process of it falling onto the floor would be gravity.
a pen
A ball pen is another term for a ballpoint pen, a pen with an internal chamber filled with a viscous quick-drying ink dispensed at the tip due to the rolling action of a metal sphere.
A ballpoint pen is a form of pen which has an internal chamber with a quick-drying ink dispensed by the rolling action of a metal sphere around 0.7 millimetres in diameter.
On carpet the friction is more as it is a rough surface therefore it stops or slow down a rolling ball.
When it stops it stops. Inertia will stop it from moving unless there is some force acting on it.
Friction which is imposable to get rid of completely
Friction.
The fins and the water pressure when their travelling through the water
work.