Constants at the surface of a certain planet, the gravitational acceleration g has a magnitude of 15.0 m/s.. a 31.0-kg brass ball is transported to this planet part a what is the mass of the brass ball on the earth and on the planet? express your answers using three significant figures separated by a comma. part b what is the weight of the brass ball on the earth and on the planet? express your answers using three significant figures separated by a comma.

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.