Describe how the piece of chalk in this image may be affected by static friction, sliding friction, fluid friction and rolling friction. Which type of friction is likely to produce the greatest amount of force on the chalk?

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Asolid cylinder and a cylindrical shell have the same mass, same radius, and turn on frictionless, horizontal axles. the cylindrical shell has light-weight spokes connecting the shell to the axle. a rope is wrapped around each cylinder and tied to blocks of equal masses that are held the same height above the ground. both blocks are released simultaneously. the ropes do not slip. which block hits the ground first? or is it a tie?

Which statements did both aristotle and ptolemy assume? check all that apply.