Combine the expressions for the gravitational and radiation forces to find an expression for the net...

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Combine the expressions for the gravitational and radiation forces to find an expression for the net force. Express your answer using the symbols defined in this tutorial. (The mass of the star is M. The mass of the spacecraft is m. The area of the sail is A. The star's luminosity is L, and is equal to the average power. Recall that P = Savg A, and A = 4r. The distance between the center of the star and the spacecraft is r.) In the next step, you will substitute numbers to find the sign and direction of the net force. (Use any variable or symbol stated above along with the following as necessary: c and G.) F net Combine the expressions for the gravitational and radiation forces to find an expression for the net force. Express your answer using the symbols defined in this tutorial. (The mass of the star is M. The mass of the spacecraft is m. The area of the sail is A. The star's luminosity is L, and is equal to the average power. Recall that P = Savg A, and A = 4r. The distance between the center of the star and the spacecraft is r.) In the next step, you will substitute numbers to find the sign and direction of the net force. (Use any variable or symbol stated above along with the following as necessary: c and G.) F net