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# coursehero_mpanswersCH5 - CHAPTER 5 MASTERING PHYSICS...

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CHAPTER 5 – MASTERING PHYSICS RESULTS Problem 5.1 The three ropes in the figure are tied to a small, very light ring. Two of the ropes are anchored to walls at right angles, and the third rope pulls as shown. What are and , the magnitudes of the tension forces in the first two ropes? Problem 5.11 The forces in the figure are acting on a 7.8 object. Find the value of , the x -component of the object's acceleration. Find the value of , the y -component of the object's acceleration. Problem 5.15

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In a head-on collision, a car stops in 0.24 from a speed of 17 . The driver has a mass of 80 , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second? Problem 5.16 An astronaut's weight on earth is 800 . What is his weight on Mars, where ? Problem 5.19 How much force does an 68 astronaut exert on his chair while sitting at rest on the launch pad? How much force does the astronaut exert on his chair while accelerating straight up at 11 ?
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