Atransverse sinusoidal wave on a string is moving in the −x-direction. its speed is 30.0 m/s, and its period is 16.0 ms. at t = 0, a colored mark on the string at x = 0 has a vertical position of 2.00 cm and is moving down with a speed of 1.50 m/s.(a)
(a) what is the amplitude of the wave?

(b) what is the initial phase angle?

(c) what is the maximum transverse speed of an element of the string?

(d) write the wave equation for the wave.

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.