Download Physics 202A Fall 2012 Final Exam: Problems on Mechanics, Gravity, and Waves and more Exams Physics in PDF only on Docsity! Physics 202A FINAL EXAM Chapters 1 - 15 Fall 2012 1 Name:_______________________________ PC _____ _____ _____ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 10 points. You must show your work in a logical fashion starting with the correctly applied and clearly stated physical principles. The equations you need are on the equation sheet. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. In Game 1 of the World Series, Pablo Sandoval hit three homeruns. On his third homer, the ball left the bat at 50m/s at an angle of 33˚. Find (a)the horizontal component of the ball’s velocity, (b)the vertical component of the ball’s velocity, (c)the time the ball was in the air and (d)the distance the ball travelled. You may ignore air resistance. 2. Below is a table of data on four moons of Jupiter discovered by Galileo. Rank these moons in order of the magnitude of their orbital acceleration. That is, rank first the one with the highest acceleration and rank last the one with the smallest acceleration. Explain your reasoning. Moon Orbital Radius (x106m) Orbital Speed (x103m/s) Io 422 17.3 Callisto 1883 8.20 Ganymede 1070 10.9 Europa 671 13.7 Physics 202A FINAL EXAM Chapters 1 - 15 Fall 2012 2 3. At the right are six different crates at the top of six different ramps. The mass of each crate as well as the height and length of each ramp are given. Rank them from greatest to least based upon (a)their gravitational potential energy at the top, (b)their kinetic energy at the bottom, and (c)the speed of the crate at the bottom. You must explain your reasoning for full credit. 4. Two blocks of masses 100g and 300g are placed on a horizontal, frictionless surface. A light spring of spring constant 8.00N/m is attached to one of them. The blocks as pushed together compressing the spring 5.00cm and held in place by a cord. When the cord is cut, the small block heads off at a speed of 0.387m/s. Find the speed of the large block. Physics Ranking Tasks 68 Mechanics Sliding Masses on Incline—Kinetic Energy 64 Rank, in order from greatest to least, the final kinetic energies of the sliding masses the instant before they reach the bottom of the incline. All surfaces are frictionless. All masses start from rest. A B C D E F 10 m 5 m 5 m 10 m 5 m 7.5 m 0.5 m 2 m 0.5 m 1 m 1 m 0.75 m 10 kg 15 kg 1 kg 1 kg 5 kg 10 kg Greatest 1 _______ 2 _______ 3 _______ 4 _______ 5 _______ 6 _______ Least Or, all masses will have the same kinetic energies. _________ Please carefully explain your reasoning. How sure were you of your ranking? (circle one) Basically Guessed Sure Very Sure 1 2 3 4 5 6 7 8 9 10 64 P. Marquard, D. Maloney
