Atightrope walker walks across a 30 m long wire tied between two poles. the center of the wire is displaced vertically downward by 1.0 m when he is halfway across. if the tension in both halves of the wire at this point is 6250 n what is the mass of the tightrope walker?

Engines for propeller-driven aircraft are limited in their maximum rotational speed by the fact that the tip speed of the propeller must not approach the speed of sound in air (mach i). taking 6 ft as a typical diameter for a propeller of a light airplane and 1100 fils as the speed of sound, find the upper limit on the rpm (revolutions per minute) of the propeller shaft.