A vertical flywheel is given an angular speed of 72.5 RPM about an horizontal axis through point O. The frictionless flywheel is brought to rest as it lifts an attached weight off the ground as shown at right. The flywheel can be modeled as a ring that has a mass of 10.0 kg and a radius of 48.0 cm. Pulley Weight a. What was the tension in the rope if it takes 5.0 seconds for the flywheel to slow down to a stop as the weight is lifted? Info Tension Newtons Attempts: 0/co Submit b. How many revolutions did the flywheel make during this 5.0 seconds? I Angular Distance Revolutions Info Attempts: 0/co Submit c. How high was the weight lifted? Height d. What was the mass that was lifted? meters Info Attempts: 0/00 Submit Info Attempts 0/00 Submit ka

A vertical flywheel is given an angular speed of 72.5 RPM about an horizontal axis through point O. The frictionless flywheel is brought to rest as it lifts an attached weight off the ground as shown at right. The flywheel can be modeled as a ring that has a mass of 10.0 kg and a radius of 48.0 cm. Pulley Weight a. What was the tension in the rope if it takes 5.0 seconds for the flywheel to slow down to a stop as the weight is lifted? Info Tension Newtons Attempts: 0/co Submit b. How many revolutions did the flywheel make during this 5.0 seconds? I Angular Distance Revolutions Info Attempts: 0/co Submit c. How high was the weight lifted? Height d. What was the mass that was lifted? meters Info Attempts: 0/00 Submit Info Attempts 0/00 Submit ka

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter10: Fixed-axis Rotation

Section: Chapter Questions

Problem 10.2CYU: Check Your Understanding A centrifuge used in DNA extraction spins at a maximum rate of 7000 rpm,...

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Check Your Understanding A centrifuge used in DNA extraction spins at a maximum rate of 7000 rpm, producing a “g-force on the sample that is 6000 times the force of gravity. If the centrifuge takes 10 seconds to come to rest from the maximum spin rate: (a) What Is the angular acceleration of the centrifuge? (b) What is the angular displacement of the centrifuge during this time?
A track star runs a 400-m race on a 400-m circular track in 45 s. What is his angular velocity assuming a constant speed?
A system of point particles is rotating about a fixed axis at 4 rev/s. The particles are fixed with respect to each other. The masses and distances to the axis of the point particles are m1=0.1kg , r1=0.2m , m2=0.05kg , r2=0.4m , m3=0.5kg , r3=0.01m . (a) What is the moment of inertia of the system? (b) What is the rotational kinetic energy of the system?
A compact disc rotates at 500 rev/min. If the diameter of the disc is 120 mm, (a) what is the tangential speed of a point at the edge of the disc? (b) At a point halfway to the center of the disc?
Three children are riding on the edge of a merry-go-round that is 100 kg, has a 1.60-m radius, and is spinning at 20.0 rpm. The children have masses of 22.0, 28.0, and 33.0 kg. If the child who has a mass of 28.0 kg moves to the center of the merry-go-round, what is the new angular velocity in rpm?