# HW12 - homework 12 – RAHMAN, TARIQUE – Due: Mar 4 2008,...

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Unformatted text preview: homework 12 – RAHMAN, TARIQUE – Due: Mar 4 2008, 9:00 pm 1 Question 1, chap 9, sect 1. part 1 of 2 10 points A ball is tossed straight up from the surface of a small, spherical asteroid with no atmo- sphere. The ball rises to a height equal to the asteroid’s radius and then falls straight down toward the surface of the asteroid. What forces, if any, act on the ball while it is on the way up? 1. Only a constant gravitational force that acts downward 2. Only an increasing gravitational force that acts downward 3. Both a constant gravitational force that acts downward and a decreasing force that acts upward 4. No forces act on the ball. 5. Only a decreasing gravitational force that acts downward Question 2, chap 9, sect 1. part 2 of 2 10 points The acceleration of the ball at the top of its path is 1. equal to one-half the acceleration at the surface of the asteroid. 2. zero. 3. equal to the acceleration at the surface of the asteroid. 4. at its maximum value for the ball’s flight. 5. equal to one-fourth the acceleration at the surface of the asteroid. Question 3, chap 9, sect 1. part 1 of 2 10 points Compare the gravitational force on a 30 kg mass at the surface of the Earth ( R E = 6 . 4 × 10 6 m, M E = 6 × 10 24 kg) with that on the surface of the Moon ( M M = 1 81 . 3 M E , R M = 0 . 27 R E )....
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## This note was uploaded on 02/03/2010 for the course PHY 303K taught by Professor Turner during the Fall '08 term at University of Texas at Austin.

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HW12 - homework 12 – RAHMAN, TARIQUE – Due: Mar 4 2008,...

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