In the figure, two skaters, each of mass 49.5 kg, approach each other along parallel paths separated by 3.65 m. They have opposite velocities of 1.91 m/s each. One skater carries one end of a long pole of negligible mass, and the other skater grabs the other end as she passes. The skaters then rotate about the center of the pole. Assume that the friction between skates and ice is negligible. What are (a) the radius of the circle, (b) the angular speed of the skaters, and (c) the kinetic energy of the two-skater system? Next, the skaters each pull along the pole until they are separated by 1.74 m. What then are (d) their angular speed and (e) the kinetic energy of the system? (a) Number i Units (b) Number Units (c) Number i Units Nu wit (d) Number Units D Que Friday 8 sty esc 80

In the figure, two skaters, each of mass 49.5 kg, approach each other along parallel paths separated by 3.65 m. They have opposite velocities of 1.91 m/s each. One skater carries one end of a long pole of negligible mass, and the other skater grabs the other end as she passes. The skaters then rotate about the center of the pole. Assume that the friction between skates and ice is negligible. What are (a) the radius of the circle, (b) the angular speed of the skaters, and (c) the kinetic energy of the two-skater system? Next, the skaters each pull along the pole until they are separated by 1.74 m. What then are (d) their angular speed and (e) the kinetic energy of the system? (a) Number i Units (b) Number Units (c) Number i Units Nu wit (d) Number Units D Que Friday 8 sty esc 80

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

A child's top is held in place upright on a frictionless surface. The axle has a radius of r 3.21 mm. Two strings are wrapped around the axle, and the top is set spinning by T T applying T = 2.40 N of constant tension to each string. If it takes 0.590 s for the string to unwind, how much angular 2r momentum L does the top acquire? Assume that the strings do not slip as the tension is applied. R SP 9.15 x10¬3 kg-m² L = S Point P is located on the outer surface of the top, a distance h = 35.0 mm above the ground. The angle that the outer surface of the top makes with the rotation axis of the top is 0 = 24.0°. If the final tangential speed v, of point P is 1.45 m/s, what is the top's moment of inertia I? T 2r T 2.42 x10-4 kg-m? = Incorrect
Four 100 g masses are mounted on a much lighter (assume massless) ring. The ring has a radius of 0.1 m. If the ring is to spin around an axis perpendicular to the plane of the ring and passing through its center, what is the moment of inertia? 0.004 kg m^2 0.04 kg m^2 0.001 kg m^2 0.01 kg m^2 0.002 kg m^2
0.1/1E: In the figure, two blocks, of mass m1 = 257 g and m2 = 337 g, are connected by a massless cord that-is wrapped around a uniform disk of mass M = 492 g and radius R = 10.1 cm. The disk can rotate without friction about a fixed horizontal axis through its center; the cord cannot slip on the disk. The system is released from rest. Find (a) the magnitude of the acceleration of the blocks, (b) the tension T in the cord at the left and (c) the tension T2 in the cord at the right. %3D %3! R. (a) Number i Units m/s^2 (b) Number i Units (c) Number Units eTextbook and Media 898 MAY 1 PDF 8 tv .. DD 80 000 000 888 F9 F10 F11 F6 F7 FB F2 F3 F4 F5 @ 23 2$ & 2 3 4 7 8 9
A 45 kg figure skater is spinning on the toes of her skates at 1.3 rev/s. Her arms are outstretched as far as they will go. In this orientation, the skater can be modeled as a cylindrical torso (40 kg, 20 cm average diameter, 160 cm tall) plus two rod-like arms (2.5 kg each, 71 cm long) attached to the outside of the torso. The skater then raises her arms straight above her head. In this latter orientation, she can be modeled as a 45 kg, 20-cm-diameter, 200-cm-tall cylinder. Part A What is her new rotation frequency, in revolutions per second? Express your answer in revolutions per second. ► View Available Hint(s) W₂ Submit Provide Feedback ΑΣΦ ? rev/s
Two blocks, on the frictionless incline as shown in the figure below, are connected by a string of negligible mass passing over a pulley of mass M, radius R and moment of inertia I= MR. What is the magnitude of the acceleration (in m/s) of the blocks if my = 5 kg ,m2 = 8 kg , M = 4 kg and e = 30? %3D T2 m1 m2 Lotfen birini seçin: a. 3.72 b. 3.37 c. 3.59 d. 4.00 e. 4.15
A bicycle is traveling north at 6.84 m/s. The mass of the wheel, 2.6 kg, is uniformly distributed along the rim(I=mr2), which has a radius of 17.89 cm. What are the magnitude(in kg m2/s) and direction of the angular momentum of the wheel about its axle?
A 97.5 kg97.5 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.55 rad/s1.55 rad/s. A monkey drops a 8.03 kg8.03 kg bunch of bananas vertically onto the platform. They hit the platform at 4545 of its radius from the center, adhere to it there, and continue to rotate with it. Then the monkey, with a mass of 21.1 kg21.1 kg, drops vertically to the edge of the platform, grasps it, and continues to rotate with the platform. Find the angular velocity of the platform with its load. Model the platform as a disk of radius 1.95 m1.95 m.
In Figure 2, two skaters, each of mass 52 kg, approach each other along parallel paths separated by 2.6 m. They have opposite velocities of 1.5 m/s each. One skater carries one end of a long pole of negligible mass, and the other skater grabs the other end as she passes. The skaters then rotate around the center of the pole. Assume that the friction between skates and ice is negligible and the skaters can be treated as mass points. Calculate (a) the angular speed of the skaters (b) the kinetic energy of the two-skater system Next, the skaters pull along the pole until they separated by 1.0 m. Calculate (c) the new angular speed of the skaters (d) the new kinetic energy of the two-skater system 1.5 m/s 2.6 m 1.5 m/s Figure 2
A student places a coin on a flat disk. The flat disk is allowed to rotate around an axis through its center. The angular velocity of the flat disk gradually increases. The coin initially rotates with the disk but eventually slides off the disk. Which of the following is the best explanation for the coin's behavior? The kinetic friction was no longer large enough to provide the necessary angular acceleration The kinetic friction was no longer large enough to provide the necessary centripetal acceleration The static friction was no longer large enough to provide the necessary angular acceleration The static friction was no longer large enough to provide the necessary centripetal acceleration
In the figure, two blocks, of mass m₁ = 289 g and m₂ = 362 g, are connected by a massless cord that is wrapped around a uniform disk of mass M = 533 g and radius R = 11.3 cm. The disk can rotate without friction about a fixed horizontal axis through its center; the cord cannot slip on the disk. The system is released from rest. Find (a) the magnitude of the acceleration of the blocks, (b) the tension T₁ in the cord at the left and (c) the tension T₂ in the cord at the right. M (a) Number i (b) Number (c) Number i Units Units Units 081 R Ng
A 1140 kg1140 kg car has just passed a diner. The closest the car came to the diner was ?=24.5 mR=24.5 m, but the car has driven another ?=30.7 mx=30.7 m in the 2.65 s2.65 s elapsed since then. If the car travels at constant speed, what is the current magnitude ?L of the angular momentum of the car about the diner?
A wheel consists of eight spokes and a rim. Each of the spokes has a mass of 0.40 kg and a length of 0.30 m, which is also the radius of the wheel. The rim is a thin ring with a mass of 1.0 kg. An arrow of mass (m) and velocity (v0) is shot into the wheel and gets stuck. The arrow hits the point where the angle (θ = 45). The wheel is at rest at the start and it rotates friction-free around the exhibition centre. Find the moment of inertia of the wheel. Find the spin of the system. What will be the angular velocity of the wheel when the arrow is stuck? How does the angular velocity change when the mass and velocity of the arrow change? Please answer clean and tidy in word format.