A screwdriver is used to loosen a screw nail. The radius of the handler is 4.0 cm. The nail puts the force at 0.2 cm from the axis. The picture is shown. You apply 10 N force to loosen the nail. How much force does the nail apply to the screwdriver?

Total solidification times of three casting geometries are to be compared: a sphere, a cylinder, in which the length-to-diameter ration - 1.0, and a cube. volume = 1000 cm^3 for all three shhapes, and the same casting alloy is used. a) determine the solidification times of each geometry b) based on the results of part (a), which geometric element would make the best riser? c) if the mold constant = 3.5 min/cm^2 in chvorinov's rule, compute the total solidification time for each casting.