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q2_soln - Tuesday 11:17 AM Problem 1(30 pts A proton(mass...

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Problem 1 (30 pts) A proton (mass 1.67 e-27 kg) is located at an initial position of <1.0,-2.0,-3.0> m and moving with an initial speed of 0.98 c. (a) (6 pts) What is the rest energy of the proton? (b) (6 pts) What is the initial total particle energy of the proton? (c) (6 pts) What is the initial kinetic energy of the proton? (d) (12 pts) A constant force of <-1.4e-11,1.4e-11,1.4e-11> N is applied while the proton moves from its initial position to its final position at <11.0,-12.0,-13.0> m What is final total energy of the proton? Problem 2 (35 pts) A wire made of iron (atomic mass 56, density of 7.9 grams/per cubic centimeter) has an unstretched length of 3.5 m and a radius of 0.40 mm. A mass of 2.5 kg is hung on the end of the wire and the wire stretches by 8.5e-4 m. Tuesday, October 03, 2006 11:17 AM q2_soln Page 1
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