1973 AP Physics C FRQ

AP® Physics C 1973 Free Response QuestionsThe materials included in these files are intended for use by AP teachers for course and exam preparation in the classroom; permission for any other use must be sought from the Advanced Placement Program®. Teachers may reproduce them, in whole or in part, in limited quantities, for face-to-face teaching purposes but may not mass distribute the materials, electronically or otherwise. These materials and any copies made of them may not be resold, and the copyright notices must be retained as they appear here. This permission does not apply to any third-party copyrights contained herein. These materials were produced by Educational Testing Service® (ETS®), which develops and administers the examinations of the Advanced Placement Program for the College Board. The College Board and Educational Testing Service (ETS) are dedicated to the principle of equal opportunity, and their programs, services, and employment policies are guided by that principle. The College Board is a national nonprofit membership association dedicated to preparing, inspiring, and connecting students to college and opportunity. Founded in 1900, the association is composed of more than 4,200 schools, colleges, universities, and other educational organizations. Each year, the College Board serves over three million students and their parents, 22,000 high schools, and 3,500 colleges, through major programs and services in college admission, guidance, assessment, financial aid, enrollment, and teaching and learning. Among its best-known programs are the SAT®, the PSAT/NMSQT®, and the Advanced Placement Program® (AP®). The College Board is committed to the principles of equity and excellence, and that commitment is embodied in all of its programs, services, activities, and concerns. APIEL is a trademark owned by the College Entrance Examination Board. PSAT/NMSQT is a registered trademark jointly owned by the College Entrance Examination Board and the National Merit Scholarship Corporation. Educational Testing Service and ETS are registered trademarks of Educational Testing Service. Copyright © 1973 by College Entrance Examination Board. All rights reserved. College Board, Advanced Placement Program, AP, SAT, and the acorn logo are registered trademarks of the College Entrance Examination Board. On the diagrams below draw all of the forces acting on each block. Assuming ω is large enough to keep both strings taut. R. Advanced Placement Program. Find the acceleration of each block. The coefficient of friction between the blocks is μ. Find the minimum angular velocity. If the deceleration of the bullet is constant and it penetrates 12 centimeters into the wall. b. find the force each string exerts on the ball in terms of ω. how much time is required for the bullet to stop? c. m. 1973M2. instead. 1973M3. c. relative to the horizontal surface. d. a1 and a2. that the stopping force increases from zero as the bullet penetrates. The entire system rotates at constant angular velocity ω about the axis of the rod. g. College Board. calculate the force on the bullet while it is stopping. a. Copyright © 1973 by College Entrance Examination Board. . Find an expression for the energy dissipated as heat because of the friction between the two blocks.1973M1. and a2. Suppose. a. A ball of mass m is attached by two strings to a vertical rod. A 30-gram bullet is fired with a speed of 500 meters per second into a wall. and θ. b. a. as shown above. The larger block slides without friction along a horizontal surface. and the acorn logo are registered trademarks of the College Entrance Examination Board. b. The blocks start from rest with the small block at one end of the larger block. AP. find the time t needed for the small block to slide off the end of the larger block. SAT. A horizontal force F is applied to a small block of mass m1 to make It slide along the top of a larger block of mass m2 and length l. In terms of 1. Discuss the motion in comparison to the case for a constant deceleration. Identify each force. as shown. All rights reserved. If the deceleration of the bullet is constant and it penetrates 12 centimeters into the wall. ωmin for which the lower string barely remains taut. a1. 1973E3. d. a. Show on the diagram the direction of the current in the sliding bar. The width of the track is l. Denoting by v the instantaneous speed with which the bar is sliding down the incline.1973E1. and A. c. How is the force F related to the change in stored energy ? Determine F in terms of x.0 meters directly below the wire. instead.10 gauss. AP. All rights reserved.e. A surveyor attempts to use a compass below a power line carrying a steady current of 103 amperes. q. SAT. b. a. The electrical resistance of the bar between its two points of contact with the track is R: the track has negligible resistance. Advanced Placement Program. the spacing x is much smaller than the plate dimensions. as shown above. Would the compass reading be disturbed? Explain your answer qualitatively in terms of the properties of the compass. determine an expression for the magnitude of the current in the bar. and the acorn logo are registered trademarks of the College Entrance Examination Board. Copyright © 1973 by College Entrance Examination Board. i. The compass Is 6. b. a metal bar of mass m is released from rest and slides without friction down a track inclined at an angle θ. Suppose.. Assume that edge effects are negligible. a. If the horizontal component of the Earth’s field is 0. College Board. Each plate has charge q and area A. Determine an expression for the terminal velocity of the sliding bar. The plates of an isolated parallel plate capacitor are pulled apart very slowly by a force F. Determine the change of stored energy in the capacitor as x is increased by dx c. Determine an expression for the force exerted on the bar by the magnetic field. Determine the change in capacitance as x is increased by dx b. 1973E2. the current were 103 amperes of 60 cycles per second alternating current. . could the power line disturb the compass reading? Give a quantitative argument. In a uniform magnetic field B directed vertically downward.