As part of an engineering project for class, Emma needs to make a wave on a rope to touch a switch on the bottom of a box. A wave generator is used to make the rope move in a wave motion. One machine is making a wave on a rope. The wave almost reaches a switch on another machine. Even when Emma turns the machine up to its highest power setting, the rope does not go up high enough to touch the switch. Emma cannot move the switch or the wave generator. What question could Emma investigate to help with her design?

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.