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Unformatted text preview: markowitz (am45362) HW07 distler (56295) 1 This print-out should have 22 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points Find the escape speed for a rocket leaving the moon. The acceleration of gravity on the moon is 0 . 166 times that on earth and the moons radius is 0 . 273 R E . Answer in units of km / s 002 10.0 points An object is projected upward from the sur- face of the earth with an initial speed of 5 km / s. The acceleration of gravity is 9 . 81 m / s 2 . Find the maximum height it reaches. Answer in units of km 003 (part 1 of 3) 10.0 points A 2 g rock on a string is whirled fast enough (in a clockwise direction) to move in a vertical circle as shown. The rock has only enough velocity at the top of the loop to keep a very small (negligible) tension in the string. 2 g 2 m 7 3 center The angle 73 is measured from the vertical axis when the rock is at its lowest position ( i.e. , measured from the negative y axis in a counter-clockwise direction). What is the magnitude of the centripetal acceleration when = 73 ? Answer in units of m / s 2 004 (part 2 of 3) 10.0 points What is the magnitude of the total accelera- tion when = 73 ? Answer in units of m / s 2 005 (part 3 of 3) 10.0 points What angle does the total acceleration make with the string when = 73 ? Answer in units of 006 (part 1 of 2) 10.0 points A small turtle, appropriately named Dizzy, is placed on a horizontal, rotating turntable at a distance of 25 . 7 cm from its center. Dizzys mass is 69 . 9 g, and the coefficient of static friction between his feet and the turntable is...
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