FIGURE CP8.69 FIGURE CP8.70 70. IL A 500 g steel block rotates on a steel table while attached to a 1.2-m-long hollow tube as shown in FIGURE CP8.70. Compressed air fed through the tube and ejected from a nozzle on the back of the block exerts a thrust force of 4.0 N perpendicular to the tube. bas be Exercises and Problems 203 onical The maximum tension the tube can withstand without breaking vith a is 50 N. If the block starts from rest, how many revolutions does °. He it make before the tube breaks? negli- 71. I|I If a vertical cylinder of water (or any other liquid) rotates same about its axis, as shown in FIGURE CP8.71, the surface forms a smooth curve. Assuming that the water rotates as a unit (i.e., all the water rotates with the same angular velocity), show that ght y n for the shape of the surface is a parabola described by the equation z = (w³/2g)r² Each particle of water on the surface is subject to only nd the normal force due to the water ays, acts perpendicular

FIGURE CP8.69 FIGURE CP8.70 70. IL A 500 g steel block rotates on a steel table while attached to a 1.2-m-long hollow tube as shown in FIGURE CP8.70. Compressed air fed through the tube and ejected from a nozzle on the back of the block exerts a thrust force of 4.0 N perpendicular to the tube. bas be Exercises and Problems 203 onical The maximum tension the tube can withstand without breaking vith a is 50 N. If the block starts from rest, how many revolutions does °. He it make before the tube breaks? negli- 71. I|I If a vertical cylinder of water (or any other liquid) rotates same about its axis, as shown in FIGURE CP8.71, the surface forms a smooth curve. Assuming that the water rotates as a unit (i.e., all the water rotates with the same angular velocity), show that ght y n for the shape of the surface is a parabola described by the equation z = (w³/2g)r² Each particle of water on the surface is subject to only nd the normal force due to the water ays, acts perpendicular

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 12.3CQ: (a) Give an example in which the net force acting on an object is zero and yet the net torque is...

See similar textbooks

Similar questions

A discus thrower rotates with a discus in his hand before letting it go. (a) How does his moment of inertia change after releasing the discus? (b) What would be a good approximation to use in calculating the moment of inertia of the discus thrower and discus?
Describe different collisions—one in in which angular momentum is conserved, and the other in which it is not. Which condition determines whether or not angular momentum is conserved in a collision?
1. A marble rolls with a velocity of 10 mm/s [E] on a game board that is being pulled [60o N of E] at 40.0 mm/s. What is the velocity of the marble relative to the floor?
The engine of a model airplane must both spin a propellerand push air backward to propel the airplane forward. (a) Modelthe propeller as three 0.20-m-long thin rods of mass 0.040 kgeach, with the rotation axis at one end. What is the momentof inertia of the propeller?
A marble rolls with a velocity of 10 mm/s [E] on a game board that is being pulled [60° N of E] at 40.0mm/s. What is the velocity of the marble relative to the floor?
A 30-kg child is sitting 5.0 m from the center of a 500-kg merry-go-round that is rotating counter-clockwise at 1.70 rad/s. A braking mechanism provides an acceleration of magnitude 0.05 rad/s2. Determine the number of rotations to bring the merry-go-round to rest. What is the initial tangential velocity of the child?
Some dragonflies splash down ontothe surface of a lake to clean themselves. After this dunking, thedragonflies gain altitude, and then spin rapidly at about 1000 rpmto spray the water off their bodies. When the dragonflies do this“spin-dry,” they tuck themselves into a “ball” with a moment ofinertia of 2.6 * 10-7kg·m2. How much energy must the dragonflygenerate to spin itself at this rate?
A bowling ball rolls up a ramp 0.5 m high without slipping to storage. It has an initial velocity of its center of mass of 3.0 m/s. (a) What is its velocity at the top of the ramp? (b) If the ramp is 1 m high does it make it to the top?
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?
A thin meter stick of mass 150 g rotates around an axis perpendicular to the stick’s long axis at an angular velocity of 240 rev/min. What is the angular momentum of the stick if the rotation axis (a) passes through the center of the stick? (b) Passes through one end of the stick?
(a) Give an example in which the net force acting on an object is zero and yet the net torque is nonzero, (h) (five an example in which the net torque acting on an object is zero and yet the net force is nonzero.
Each Voyager spacecraft was accelerated toward escape speed from the Sun by the gravitational force exerted by Jupiter on the spacecraft. (a) Is the gravitational force a conservative or a nonconservative force? (b) Does the interaction of the spacecraft with Jupiter meet the definition of an elastic collision? (c) How could the space-craft be moving faster after the collision?