# on4 - (a) It slows down because there is nothing to keep it...

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Solution for On-Line Homework 4 Acceleration II, Inertia I Solution to On-Line Homework Problem 4.1(Galileo’s Experiments) Problem: What is the magnitude of the acceleration of an object sliding down a frictionless surface that is inclined 37 with respect to the horizontal? Select One of the Following: (a) 0 (b) 3 . 4m / s 2 (c-Answer) 5 . 9m / s 2 (d) 7 . 8m / s 2 (e) 9 . 8m / s 2 Solution Using the relationship: a = g sin θ Where g is simply acceleration due to gravity, 9 . 8m / s 2 , and θ = 37 a = 9 . 8m / s 2 sin 37 = 5 . 9m / s 2 Total Points for Problem: 2 Points Solution to On-Line Homework Problem 4.2() Problem: If there is no friction on an object in mo- tion, and nothing else is interacting with the object, what happens to the object’s velocity? Choose the best answer. 1

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Unformatted text preview: (a) It slows down because there is nothing to keep it going, so the velocity decreases. (b-Answer) It keeps going at the same speed and in the same direction, because there is nothing to change either, so the velocity is constant. (c) It keeps going at the same speed, because there is nothing to change it, so the velocity is constant. (d) It keeps going in the same direction, because there is nothing to change it, so the velocity is constant. (e) The velocity increases. Solution Nothing. If there are no interactions, the velocity remains constant because there is nothing to change the speed or the direction of the motion. Total Points for Problem: 2 Points 2...
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## on4 - (a) It slows down because there is nothing to keep it...

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