I. Modified Multiple Choices: Write the letter of your choice on the space provided. Then explain or show the solutionthat justifies your answer. Each item is worth 2 points; correct answers but without solution will gain only 1 point.1. A particle moves in a circle of radius 1.50 m according to the relation (t)=5t + 3t, where Ois measured inradians and t in seconds. What is the linear speed of the particle after 3.00 seconds?a) 33.0 m/sb) 49.5 m/sc) 54.0 m/sd) 45.0 m/s2. Refer to #1. What is the tangential acceleration after 3.00 seconds?b) 45.0 m/s²a) 10.0 m/s²c) 30.0 m/s²d) 15.0 m/s²3. An ice skater spins with arms fully extended. If she pulls her arms closer to her body then(a) the kinetic energy increases(b) the moment of inertia decreases(c) the angular momentum remains constant(d) all of these4. Juan Tamad is pedalling a bicycle at 10 m/s. Suppose the diameter of the bicycle wheels is 132 cm. What is theangular speed of the wheels?(a) 7.5 rad/sb) 13 rad/sc) 10 rad/sd) 15 rad/s5. A grinder disc of mass 2.0 kg with 8.0 cm radius rotates at 500 rev/min. What is its rotational kinetic energy?a) 8.8 Jb) 17 Jc) 26 Jd) 43 J6. A DVD disc starts rotating from rest and makes 6.0 rad after 3 seconds. Assuming it accelerates uniformly, whatis its angular velocity at the end of that time?a) 2.0 radb) 3.0 radc) 4.00d) 5.07. The moment of inertia of a body about an axis depends on itsa) angular velocityb) mass distributionc) angular accelerationd) none of these8. A super car engine delivers a power of 895 kW corresponding to a maximum angular speed of 6400 rev/min.What is the torque produce by the engine?a) 668 N-mb) 895 N-mc) 640 N-md) 1336 N-m9. A flywheel is rotating at 2.0 rad/s. How much time does it take to complete one revolution?а) 2.1 sb) 0.32 sс) 3.1 sd) 6.3 s10. A wooden ball is tied by a light string to a rod. The ball is then rotated with constant angular speed. Whathappensto its linear speed when the length of the string is doubled?a) doubledb) reduced by halfc) tripledd) remains the same

Angular velocity = rate of change of angular displacement

_1. A particle moves in a circle of radius 1.50 m according to the relation ()=5t + 3t, where 0 is measuredi radians and t in seconds. What is the linear speed of the particle after 3.00 seconds? a) 33.0 m/s b) 49.5 m/s c) 54.0 m/s d) 45.0 m/s _2. Refer to #1. What is the tangential acceleration after 3.00 seconds? b) 45.0 m/s² c) 30.0 m/s² a) 10.0 m/s² d) 15.0 m/s²

_1. A particle moves in a circle of radius 1.50 m according to the relation ()=5t + 3t, where 0 is measuredi radians and t in seconds. What is the linear speed of the particle after 3.00 seconds? a) 33.0 m/s b) 49.5 m/s c) 54.0 m/s d) 45.0 m/s _2. Refer to #1. What is the tangential acceleration after 3.00 seconds? b) 45.0 m/s² c) 30.0 m/s² a) 10.0 m/s² d) 15.0 m/s²

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter13: Gravitation

Section: Chapter Questions

Problem 37P: Two planets in circular orbits around a star have speed of v and 2v . (a) What is the ratio of the...

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