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Unformatted text preview: he air, etc.), the mechanical energy CHAPTER 8 129 between the springs, ~mv2 = !kex~, or v == . xl../k,Jrri = ../(130 N/m)/{O.2 kg) (0.16 m) = 4.08 m/s. (Of course, consideration of the right-hand spring must give the same result.) Problem .... An initial speed of 2.4 km/s (the "escape speed") 29. is required for an object launched from the moon to get arbitrarily far from the moon. At a mining operation on the moon, lOOO-kg packets of ore are to be launched to a smelting plant in orbit around the Earth. If they are launched with a large spring whose maximum compression is 15 m, what should be the sp~ing constant of the spring? Problem 30 Solution. Problem 31. A low-damage bumper on a 1400-kg car is mounted on springs whose total effective spring constant is 7.0x105 N/m. The springs can undergo a maximum compression of 16 cm without damage to the bumper, springs, or car. What is the maximum speed at which the car can collide with a stationary object without sustaining damage? Solution ... an ideal spring (without lo...
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This note was uploaded on 07/27/2009 for the course PHYSICS 101 taught by Professor Wormer during the Spring '08 term at NYU Poly.

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