18) As planets interact with the Sun in our solar system, the force of gravity plays a role in their revolutionary orbit. Which
of these describes how the planets revolve around the sun due to its gravitational pull?
1)
A)
The planets have a linear path back and forth past the Sun.
B)
The planets have a circular path with the Sun at the center of the circle.
The Sun rotates around the planets, which are stationary in the solar
system.
The planets have an elliptical path with the Sun at one of the foci of the
ellipse.
)
D)

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.