An Atwood machine consists of two masses, m =7.0 kg and mp = 8.1 kg, connected by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius Ro = 0.40 m and mass 0.70 kg. Part A Determine the magnitude of the acceleration a of each mass. Express your answer using two significant figures. a = 0.70 m/s? Submit Previous Answers v Correct Part B What percentage of error in a would be made if the moment of inertia of the pulley were ignored? Ignore friction in the pulley bearings. Express your answer using two significant figures. να ΑΣφ ? Error =

An Atwood machine consists of two masses, m =7.0 kg and mp = 8.1 kg, connected by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius Ro = 0.40 m and mass 0.70 kg. Part A Determine the magnitude of the acceleration a of each mass. Express your answer using two significant figures. a = 0.70 m/s? Submit Previous Answers v Correct Part B What percentage of error in a would be made if the moment of inertia of the pulley were ignored? Ignore friction in the pulley bearings. Express your answer using two significant figures. να ΑΣφ ? Error =

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And Gravitation

Section: Chapter Questions

Problem 20P: Human centrifuges are used to train military pilots and astronauts in preparation for high-g...

See similar textbooks

Similar questions

Keratinocytes are the most common cells in the skins outer layer. As these approximately circular cells migrate across a wound during the healing process, they roll in a way that reduces the frictional forces impeding their motion. (a) Given a cell body diameter of 1.00 105 m (10 m), what minimum angular speed would be required to produce the observed linear speed of 1.67 107 m/s (10 m/min)? (b) How many complete revolutions would be required for the cell to roll a distance of 5.00 103 m? (Because of slipping as the cells roll, averages of observed angular speeds and the number of complete revolutions are about three times these minimum values.)
(II) How fast (in rpm) must a centrifuge rotate if a particle 7.00 cm from the axis of rotation is to experience an acceleration of 125,000 g’s?
(II) How fast (in rpm) must a centrifuge rotate if a particle8.0 cm from the axis of rotation is to experience an acceleration of 100,000 g’s?
1) A boy releases his 2.0 kg toy, from rest, at the top of a sliding-pond inclined at 20o above the horizontal. What will the toy's speed be after sliding 4.0 m along the sliding-pond? The coefficient of kinetic friction is 0.20. 2) A race car, traveling at a constant speed of 50 m/s, drives around a circular track of radius 250 m. What angular acceleration does it experience?
A ceiling fan is rotating at 0.96 rev>s. Whenturned off, it slows uniformly to a stop in 2.4 min. (a) How manyrevolutions does the fan make in this time? (b) Using the resultfrom part (a), find the number of revolutions the fan must makefor its speed to decrease from 0.96 rev>s to 0.48 rev>s.
A new car is tested on a 270-mm-diameter track. If the car speeds up at a steady 1.3 m/s2m/s2 , how long after starting is the magnitude of its centripetal acceleration equal to the tangential acceleration? Express your answer to two significant figures and include the appropriate units.
An object is acted on by a single nonzero force of magnitudeF. (a) Is it possible for the object to have zero acceleration a?(b) Is it possible for the object to have zero angular acceleration∝? (c) Is it possible for the object to be in mechanicalequilibrium?
A centrifuge in a medical laboratory rotates at an angular speed of 3,450 rev/min. When switched off, it rotates through 52.0 revolutions before coming to rest. Find the constant angular acceleration (in rad/s2) of the centrifuge. rad/s2 ?
The tires on a new compact car have a diameter of 2.0 ft and are warranted for 60 000 miles, (a) Determine the angle (in radians) through (which one of these tires will rotate during the warranty period, (b) How many revolutions of the tire are equivalent to your answer in part (a)?
An athlete swings a 5.00-kg ball horizontally on the end of a rope. The ball moves in a circle of radius 0.800 m at an angular speed of 0.500 rev/s. What are (a) the tangential speed of the ball and (b) its centripetal acceleration? (c) If the maximum tension the rope can withstand before breaking is 100. N, what is the maximum tangential speed the ball can have?
Suppose just two external forces act on a stationary, rigid object and the two forces are equal in magnitude and opposite in direction. Under what condition does the object start to rotate?
(a) What is the radius of a bobsled turn banked at 75.0° and taken at 30.0 m/s, assuming it is ideally banked? (b) Calculate the centripetal acceleration. (c) Does this acceleration seem large to you?