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HW07-problems

HW07-problems - markowitz(am45362 HW07 distler(56295 1 This...

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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 10.0points 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 moon’s radius is 0 . 273 R E . Answer in units of km / s 002 10.0points 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(part1of3)10.0points 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 73 ω 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 θ = 73 ? Answer in units of m / s 2 004(part2of3)10.0points What is the magnitude of the total accelera- tion when θ = 73 ? Answer in units of m / s 2 005(part3of3)10.0points What angle does the total acceleration make with the string when θ = 73 ? Answer in units of 006(part1of2)10.0points A small turtle, appropriately named “Dizzy”, is placed on a horizontal, rotating turntable at a distance of 25 . 7 cm from its center. Dizzy’s mass is 69 . 9 g, and the coefficient of static friction between his feet and the turntable is 0 . 41.

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HW07-problems - markowitz(am45362 HW07 distler(56295 1 This...

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