A compact disc (CD) is an ancient form of technology used to store music and data. Model a CD as a uniform cylindrical disk with a 6 cm radius and a mass of 25 g. This CD spins about an axis through its center. For this scenario, assume the CD starts from rest and undergoes uniform angular acceleration for 2 s, reaching a maximum angular speed of 400 rpm. Note Icylinder = 1/2 MR² about an axis through its center. Multiple Choice Questions 1) What is the torque required to spin up this CD from rest in 2 s? a) 0 c) 3.2 × 10-4 N.m e) 7.1 x 10 N·m b) 1.7 x 104 N.m d) 4.7 x 104 N-m f) 9.4 × 104 N m 2) Through what angle does the CD rotate during these 2 s? a) 42 rad c) 66 rad e) 90 rad b) 54 rad d) 78 rad f) 102 rad

A compact disc (CD) is an ancient form of technology used to store music and data. Model a CD as a uniform cylindrical disk with a 6 cm radius and a mass of 25 g. This CD spins about an axis through its center. For this scenario, assume the CD starts from rest and undergoes uniform angular acceleration for 2 s, reaching a maximum angular speed of 400 rpm. Note Icylinder = 1/2 MR² about an axis through its center. Multiple Choice Questions 1) What is the torque required to spin up this CD from rest in 2 s? a) 0 c) 3.2 × 10-4 N.m e) 7.1 x 10 N·m b) 1.7 x 104 N.m d) 4.7 x 104 N-m f) 9.4 × 104 N m 2) Through what angle does the CD rotate during these 2 s? a) 42 rad c) 66 rad e) 90 rad b) 54 rad d) 78 rad f) 102 rad

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

You are in a tall building located near the equator. As you ride an elevator from the ground floor to the top floor, your tangential speed due to the earth's rotation O increases O decreases O increases when the speed of the elevator increases and decreases when the speed of the elevator decreases does not change
A ship's wheel can be approximated as an annular cylinder (different from a ring) of mass 6.7 kilograms, inner radius 25 centimeters, and outer radius 32 centimeters; and eight spokes of mass 0.50 kilograms and length 49 centimeters. a. What is the moment of inertia? Include units in your answer. More information. b. Disagreeing over which way to go, the captain and the helmsman try to turn the wheel in opposite directions. The captain applies a force of 311 newtons at the inner radius, while the helmsman applies a force of 287 newtons at the outer radius. What is the magnitude of the angular acceleration of the wheel? Include units in your answer.
An electric ceiling fan is rotating about a fixed axis with an initial angular velocity magnitude of 2.00 rad/s . The magnitude of the angular acceleration is 0.5 rad/s2 . Both the angular velocity and angular acceleration are directed clockwise. The electric ceiling fan blades form a circle of diameter 0.50 m. A) How long does it take for the angular velocity to reach 4 rad/s? B) What angle do the blades turn through in that time?
A pitcher throws a curveball that reaches the catcher in 0.64 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in radians) as it travels from the pitcher to the catcher?
I need some help. Can you walk me through how to solve this problem? To throw the discus, the thrower holds it with a fully outstretched arm. Starting from rest, he begins to turn with a constant angular acceleration, releasing the discus after making one complete revolution. The diameter of the circle in which the discus moves is about 1.9 m. If the thrower takes 1.2 s to complete one revolution, starting from rest, what will be the speed of the discus at release?
Please answer question 2
Flywheels are large, massive wheels used to store energy. They can be spun up slowly, then the wheel's energy can be released quickly to accomplish a task that demands high power. An industrial flywheel has a 1.5 m diameter and a mass of 250 kg. A motor spins up the flywheel with a constant torque of 50N⋅m50N⋅m. How long does it take the flywheel to reach top angular speed of 1200 rpm? Show a diagram
A large wind turbine (typical of the size and specifications of a turbine that you see in a modern wind farm) has three blades connected to a central hub. The blades are 50 m long and rotate at 10 rpm. What angular speed ω does this correspond to? What is the speed ν of the tip of a blade? What is the speed of a point 25 m from the hub?
A bicycle wheel has a radius r = 0.24 m and rotates at a constant frequency of f = 79 rev/min. a. Calculate the period of rotation of the wheel in T seconds b. What is the tangential speed of a point on the wheel's outer edge in m/s?
A marching band is performing a routine in which all players form a line that rotates about the center player C. The players complete one full 360 degrees rotation in one minute and are always in a line. Of players A and B, which player has the greater linear speed v and which player has the greater angular speed w A. Player A has a greater linear speed v, but they have the same angular speed w. B.Player B has a greater angular speed w, but they have the same linear speed v. C.Player A has a greater angular speed w, but they have the same linear speed v. D.Player B has a greater linear speed v, but they have the same angular speed w
A turntable rotates at 45 rev/min. Calculate the angular velocity of the turntable. A particle on the turntable is located 0.13 m from the center of the rotating turntable. What is the speed of the particle? The particle on the turntable has a mass of 3 g. Calculate the force of friction which keeps it from sliding off.
A student is whirling a ball on a string in a circle with an angular speed of 20 rad/s. Air drag decelerates the ball at a rate of -3 rad/s2. What is the angular speed of the ball after it has spun through an angle of 30 radians? Remember to include units with your answer. A disk is initially at rest. If the disk speeds up uniformly to a speed of 45 rad/s in a time of 15 seconds, what angle does it turn through? Remember to include units with your answer.