ACTIVIDAD No. 1: a. Realiza las siguientes conversiones entre unidades de longitud
- Expresar 420 m en Km
- Expresar 2,14 mi en in
- Expresar 354 yd en ft
- Expresar 90 cm en in
b. Realiza las siguientes conversiones entre unidades de tiempo
- Expresar 2500 s en horas
- Expresar 3.5 h en min
- Expresar 0,43 siglos en meses
- Expresar 2 h en s

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.