Physics 15200- HW19

Physics 15200- HW19 - 6 . 672 10 11 N m 2 / kg 2 . Answer...

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lai (yl8859) – HW19 – Ross – (15200) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points How high does a rocket have to go above the Earth’s surFace so that its weight is reduced to 64 . 9 % oF its weight at the Earth’s sur- Face? The radius oF the Earth is 6380 km and the universal gravitational constant is 6 . 67 × 10 11 N · m 2 / kg 2 . Answer in units oF km. 002 (part 1 oF 2) 10.0 points On the way to the moon, the Apollo astro- nauts reach a point where the Moon’s gravi- tational pull is stronger than that oF Earth’s. ±ind the distance oF this point From the center oF the Earth. The masses oF the Earth and the Moon are 5 . 98 × 10 24 kg and 7 . 36 × 10 22 kg, respectively, and the distance From the Earth to the Moon is 3 . 84 × 10 8 m. Answer in units oF m. 003 (part 2 oF 2) 10.0 points What is the acceleration due to the Earth’s gravity at this point? The value oF the universal gravitational constant is
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Unformatted text preview: 6 . 672 10 11 N m 2 / kg 2 . Answer in units oF m / s 2 . 004 (part 1 oF 2) 10.0 points Three 2 kg masses are located at points in the xy plane as shown. 46 cm 53 cm What is the magnitude oF the resultant Force (caused by the other two masses) on the mass at the origin? The universal gravita-tional constant is 6 . 6726 10 11 N m 2 / kg 2 . Answer in units oF N. 005 (part 2 oF 2) 10.0 points At what angle From the positive x-axis will the resultant Force point? Let counterclockwise be positive, within the limits-180 to 180 . Answer in units oF . 006 10.0 points Planet X has a mass 5 . 26 times that oF the Earth and a radius 3 . 14 times the radius oF the Earth. What is the acceleration due to gravity on the surFace oF Planet X, measured in units oF g (the gravitational acceleration on the surFace oF the Earth)? Answer in units oF g ....
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