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Question1

The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass of moon=7.35 × 1022 kg. The distances exposed in the drawing are rSM = 1.50 × 1011 m and rEM = 3.85 × 108 m. create the magnitude of the net gravitational force on moon.

Question2

The Sears Tower in Chicago is 110 stories (436 m) above street level, and roof of the tower is 442 m above the street. Suppose that a golf ball is thrown down from the roof of Sears Tower. Neglecting air resistance, golf ball accelerates at 9.8 m/s2 and lands on the pavement after 9.2 s. If the ball’s final speed is 93.0 m/s, what was speeding with that the ball was firstly thrown?

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