9. Work & Energy
Intro to Energy & Kinetic Energy
13:55 minutes
Problem 9l
Textbook Question
Textbook QuestionThe gravitational attraction between two objects with masses mᴀ and mᴃ, separated by distance 𝓍, is F = Gmᴀmᴃ/𝓍², where G is the gravitational constant. (b) If one mass is much greater than the other, the larger mass stays essentially at rest while the smaller mass moves toward it. Suppose a 1.5 x 10¹³ kg comet is passing the orbit of Mars, heading straight for the sun at a speed of 3.5 x 10⁴ m/s. What will its speed be when it crosses the orbit of Mercury? Astronomical data are given in the tables at the back of the book, and G = 6.67 x 10 ¯¹¹ Nm²/kg² ..
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