A thin, light string is wrapped around the rim of a 4.00 kg solid uniform disk that is 30.0 cm in diameter. A person pulls on the string with a constant force of 100.0 N tangent to the disk, as shown in Figure 10.48. The disk is not attached to anything and is free to move and turn. (a) Find the
Figure 10.48
Problem 13.
Want to see the full answer?
Check out a sample textbook solutionChapter 10 Solutions
College Physics (10th Edition)
Additional Science Textbook Solutions
Cosmic Perspective Fundamentals
Physics (5th Edition)
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
Lecture- Tutorials for Introductory Astronomy
College Physics: A Strategic Approach (4th Edition)
- If the angular acceleration of a rigid body is zero, what is the functional form of the angular velocity?arrow_forwardA box of unknown mass is suspended from the end of a strong, thin wire. The other end of the wire is wrapped around the outer rim of a solid disk whose massis 11.0 kg and radius is 54.0 cm. The disk turns on a frictionless axle through its center. The box travels a distance 12.0 m during a time interval of 3.40 s starting from rest.Find the mass of the box.arrow_forwardConsider a pendulum with a 4 kg mass hanging from a light string. If the pendulum is 0.3 m long, and is at an angle of 32.9 deg. to the right of the vertical. What is the net torque (so magnitude and direction) acting on the pendulum at this moment about the pivot point? Assume that nothing but the string is touching the mass.arrow_forward
- A model airplane with mass 0.749 kg is tethered to the ground by a wire so that it flies in a horizontal circle 29.3 m in radius. The airplane engine provides a net thrust of 0.801 N perpendicular to the tethering wire. (a) Find the magnitude of the torque the net thrust produces about the center of the circle. N: m (b) Find the magnitude of the angular acceleration of the airplane. rad/s? (c) Find the magnitude of the translational acceleration of the airplane tangent to its flight path. m/s?arrow_forwardThe figure below shows a rigid system which can rotate. M = 1.2 kg, L = 1.3 m, and the connecting rod as negligible mass. Treat the masses as point particles. What is the moment of inertia about an axis perpendicular to the paper and through the center of mass? Answer in units of kg m2 .arrow_forwardA disk drive is spinning at 10,000 rpm (1045 rad/s). It decelerates to rest in 0.42 s. The disk is 0.115 m in diameter with a mass of 17 grams. What is the magnitude of the tangential accelertation at a point 1/2 of the way out from the center? Find the rotational inertia of the disk, and the magnitude of the torque required to decelerate the disk.arrow_forward
- Two wheels have the same mass and radius of 4.7 kg and 0.38 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to the plane of the wheel at its center. Each turns through an angle of 14 rad in 9.5 s. Find the net external torque that acts on each wheel.arrow_forwardA hollow, spherical shell with mass 2.00 kg rolls without slipping down a 38.0° slope. (a) Find the acceleration, the friction force, and the minimum coefficient of static friction needed to prevent slipping. (b) How would your answers to part (a) change if the mass were doubled to 4.00 kg?arrow_forwardTwo wheels have the same mass and radius of 4.9kg and 0.45 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to the plane of the wheel at its center. Each turns through an angle of 13 rad in 8.4 s. Find the net external torque that acts on each wheel.arrow_forward
- As a torque activity, your Physics TA sets up the arrangement shown below. A uniform rod of mass mr = 143 g and length L = 100.0 cm is attached to the wall with a pin as shown. Cords are attached to the rod at the r1 = 10.0 cm and r2 = 90.0 cm mark, passed over pulleys, and masses of m1 = 286 g and m2 = 177 g are attached. Your TA asks you to determine the following. (a) The position r3 on the rod where you would suspend a mass m3 = 200 g in order to balance the rod and keep it horizontal if released from a horizontal position. In addition, for this case, what force (magnitude and direction) does the pin exert on the rod? Use standard angle notation to determine the direction of the force the pin exerts on the rod. Express the direction of the force the pin exerts on the rod as the angle ?F, measured with respect to the positive x-axis (counterclockwise is positive and clockwise is negative). r3 = m Fp = N ?F = ° (b) Let's now remove the mass m3 and determine the new…arrow_forwardTwo wheels have the same mass and radius of 4.6 kg and 0.51 m, respectively. One has the shape of a hoop. The wheels start from rest and have a constant angular acceleration with respect to a rotational axis that is perpendicular to the plane of the wheel at its center. Each turns through an angle of 13 rad in 9.5 s. Find the net external torque that acts on each wheel.arrow_forwardA 0.71-m-diameter solid sphere can be rotated about an axis through its center by a torque of 12.8 m∗N which accelerates it uniformly from rest through a total of 170 revolutions in 15.0 s. What is the mass of the sphere? Express your answer to two significant figures and include the appropriate units.arrow_forward
- Glencoe Physics: Principles and Problems, Student...PhysicsISBN:9780078807213Author:Paul W. ZitzewitzPublisher:Glencoe/McGraw-HillPhysics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage LearningPrinciples of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
- University Physics Volume 1PhysicsISBN:9781938168277Author:William Moebs, Samuel J. Ling, Jeff SannyPublisher:OpenStax - Rice University