What is her new angular velocity? rad/s. How much work must she do to draw her arms inwards? J.

8. A 1.80 m long pole is balanced vertically with one end on the ground. It starts to tip over from rest but the lower end of the pole on the ground does not slip. What is the speed of the upper end of the pole when it reaches the ground?

inertia of I; = 2.34 kg.m² with her arms extended and of Ir with her arms close to her body. If the ratio of the skater's final kinetic energy to her initial kinetic energy is = 6.45, Suppose an ice skater is spinning at wi = 5.03 rad/s with her arms extended. She has a moment of 5. Ki a) what is her final angular velocity wf after she pulls in her arms? b) What is her rotational inertia Iț with her arms close to her body? Wi Wf Answers: a) 32.44 rad/s; b) 0.363 kgm? Note: Moments of inertia are based on reasonable assumptions about a 60.0 kg skater

page A person 1.56 m tall swings their leg from the hip at 1.51 radians/s. Calculate the linear tangential velocity (v) at their knee to 2 decimal places. Answer. re to search 561 R T 6 B N U 8 O Pa Next page d Construction on A20...

The specifications for a ceiling fan you have just bought indicate that the total moment of inertia of its blades is 0.17 kg · m2 and they experience a net torque of 2.6 N · m. (a) What is the angular acceleration of the blades in rad/s?? rad/s? (b) When the blades rotate at 320 rpm, what is the rotational kinetic energy, in joules? Additional Materials O Reading

The rigid body shown in the figure consists of three particles connected by massless rods. It is to be rotated about an axis perpendicular to its plane through point P. If M = 0.41 kg, a = 35 cm, and b = 53 cm, how much work is required to take the body from rest to an angular speed of 5.8 rad/s? M 2M Number Units J

A cylinder of radius 2.59 cm and a sphere of radius 8.72 cm are rolling without slipping along the same floor. The two objects have the same mass. If they are to have the same total kinetic energy, what should the ratio of the cylinder's angular speed ?cyl to the sphere's angular speed ?sph be?

Suppose the rotational kinetic energy of a solid disk is 1000 J when the disk has an angular velocity of 3 rad/s. What is the disk's moment of inertia? If the mass of the disk is 50 kg, what must be its radius? moment of inertia: A. 276.5 kg-m? B. 222.2 kg-m? D. 238.5 kg-m? E. 239.2 kg-m? С. 175.9 kg-m? F. 170.3 kg-m? /--/ radius: А. 2.490 m D. 2.536 m В. 2.981 m Е. 3.341 m С. 3.212 m F. 3.195 m

A bowler uses a lane with a coefficient of kinetic friction of 0.156. The bowler releases her 5.30 kg bowling ball with a translational speed of 3.45 m/s. At the moment of release, the ball is not rotating. As the ball slides, it begins to rotate. What is the work ?ncWnc done by friction on the ball before it transitions to rolling without slipping? Use g=9.81 m/s2 for the acceleration due to gravity.

A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at its center. Rotating flywheels provide a means for storing energy in the form of rotational kinetic energy and are being considered as a possible alternative to batteries in electric cars. The gasoline burned in a 270-mile trip in a typical midsize car produces about 1.64 x 109 J of energy. How fast would a 11.4-kg flywheel with a radius of 0.238 m have to rotate to store this much energy? Give your answer in rev/min.