he may have worms. or maybe its just an itch. but if he continuously does it. see a vet or get worm killer/ prevention.
first you ejaculate onto the football, rub it around in your hands a bit and slide it across a smooth floor and WA LA you have sliding friction on a football XD
This would be sliding friction and it could happen when:run on the floor
It is: K.K. & Akriti Kakkar - Marjaani Marjaani Kasame (Balkan Remix)
The predicate in this sentence is across the floor. :)
2000 kg box on a frictionless floor
There are four types of friction: Fluid Friction (The friction caused by falling through air or water, or any other liquid etc), rolling friction (Like a ball rolling across the floor), static friction (The force it takes to begin something's movement), and sliding friction(Like pushing a box across the floor). In order of strongest to weakest it's Static, Sliding, Rolling, Fluid.
you can push is across
across the floor.
Examples of SLIDING FRICTION is pushing a heavy rock in your path, or moving a box on the floor.
1) If you push an eraser across a desk, the eraser will move for a short distance and then stop. 2) When you move a heavy dresser by pushing it along the floor.
Curling
Across the Nightingale Floor was created in 2002.