What is the force required to accelerate a 4kg rock from 3 m/s to 15 m/s in 3 seconds?

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

What is the increase in density of a medium due to wave travel?

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.