4.Two discs are rotating about an axis as shown in the figure. The moment of inertiaof the right disc is 2 kg m? and it rotates with angular speed of 2000 rpm. Themoment of inertia of the left disc is 5 kg m? and it rotates in the opposite directionwith angular speed of 100 rpm. The discs are suddenly clamped together.Determine the final common angular speed of the clamped discs.

Given: The moment of inertia of the right disk is 2 kg.m2. The moment of inertia of the left disk is…

Answered: 4. Two discs are rotating about an axis…

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)...

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Similar questions

In the rotational experiment: A student got the following graph, if the moment of inertia of the cylinder is negligible, and m1=100g, then m2 equal: 0.03 0.025 0.02 0.015 ml m2 0.01 0.005 0.02 0.04 0.06 0,08 R(m2) 0.15g 250g 150g 0.125g 125g Ime (kg.m)
A hollow disk with a moment of inertia of 0.5 kg-m2 experiences a net torque of 30 m-N. What is the disk's angular acceleration? 60 rad/s/s 0.02 rad/s/s 30 rad/s/s 15 rad/s/s
An ice skater has a moment of inertia of 4.5 kgm2 when her arms are outstretched. With her arms outstretched she is spinning 3.8 radians per second. If she pulls her arms in and decreases her moment of inertia to 2.4 kgm2, how fast is she spinning? A: 7.1 radians/second B: 2.8 radians/second C: 17.1 radians/second D: 6.2 radians/second E: 2.0 radians/second
9. A figure skater with outstretched arms spins with an initial rotation rate of 1.0 rev every 1.2 s. She can increase her rotation speed by bringing her arms close to her body. Suppose her final rotation rate is 3.0 rev every 1.2 s. Find her moment of inertia with her arms close to her body if her moment of inertia with outstretched arms is 5.0 kg-m?. (Answer: I = 1.7 kg · m²)
When a ceiling fan rotating with an angular velocity of 3.60 rad/s is turned off, a frictional torque of 0.360 Nm slows it to a stop in 30 s. What is the moment of inertia of the fan?
Three small steel balls are connected by rigid, very light rods as shown in the figure. What is the moment of inertia if the object rotates about the x-axis? If we apply a force of 200. N to the most massive ball such that the object will rotate counterclockwise about the x-axis, what angular acceleration will result?
4. A playground toy has four seats, each 5.0 kg, attached to very light, 1.5 m long rods, as seen from above in the figure. If two children with masses of 15 kg and 20 kg, sit in seats opposite one another, what is the moment of inertia about the rotation axis? 1.5 m
4. Two disks are rotating about the same axis. Disk A has a moment of inertia of 5.00 kg.m² and an angular velocity of +6.60 rad/s. Disk B is rotating with an angular velocity of –10.6 rad/s. The two disks are then linked together without the aid of any external torques, so that they rotate as a single unit with an angular velocity of -2.80 rad/s. The axis of rotation for this unit is the same as that for the separate disks. What is the moment of inertia of disk B? kg.m2 f60 s
A string is wrapped around a thin-walled cylinder pulley of radius 11.5 cm and mass of 14 kg. If the string is pulled by a force that is tangent to a point on the rim of the pulley, how much force is exerted to cause it to rotate at a constant rate of 3.92 rad/s²? The moment of inertia for thin-walled cylinder is I = mr². 0.726 N 54.9 N 6.31 N 477 N

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4. Two discs are rotating about an axis as shown in the figure. The moment of inertia of the right disc is 2 kg m and it rotates with angular speed of 2000 rpm. The moment of inertia of the left disc is 5 kg m? and it rotates in the opposite direction