Why do clothes often cling together after tum- bling in a clothes dryer? air pressure?

What is the mass of the same rock on the earth

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.

If y gets smaller as x gets bigger and y have an relationship?