Auniform chain of weight under gravity. prove, with the usual notation, that w per unit length hangs freely =c sec s c tan /, y a length 21 of this chain hangs symmetrically between fixed points a, b and supports a weight wl at its mid-point m. given that the chain at m is inclined at 30° to the horizontal, show that the depth of m below ab is /(/3 - 1), and find the distance ab

Review multiple-concept example 7 in this chapter as an aid in solving this problem. in a fast-pitch softball game the pitcher is impressive to watch, as she delivers a pitch by rapidly whirling her arm around so that the ball in her hand moves in a circle. in one instance, the radius of the circle is 0.626 m. at one point on this circle, the ball has an angular acceleration of 66.1 rad/s2 and an angular speed of 12.6 rad/s. (a) find the magnitude of the total acceleration (centripetal plus tangential) of the ball. (b) determine the angle of the total acceleration relative to the radial direction.