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20 Nov 2019

THIS QUESTION IS ROTATIONAL KINEMATICS
Q#1
(A) A wheel starts from rest and rotates about its axiswithconstant angular acceleration. after 6.8s have elapsed, ithasrotated through an angle of 25 radians. (a) what is theangularacceleration of the wheel?(b) what is the angular velocityofthe wheel when the t=6.8seconds?(c) what is thecentrepitalacceleration of a point on the wheel at a distance r=0.45m from the axis at t =6.8s?
(B) A pneumatic high speed cutter with a 7.50cmdiametercutting disc is advertizes to have a rotation rate ofbetween 5000and 18,000 rev/min. (a)what is range of angular speedin rad/s?(b)what is range of linear speed of the edge of the disc?(c) whatis the average angular acceleration, if starting from rest,thecutter comes up to its fastest speed in 2.8s?
(C) A car engine idles at 800rpm, with the car in nuetral,youdepress the accelerator. After 1.2 sec. the tachometerindicatoesan engine speed of 3400rpm.(a) what are the initialangularvelocities in rad/s? (b) what is the average angularaccelerationduring the 1.20s interval?(c) how many revolutions doesthe enginemake during that 1.20s?

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4 Feb 2019
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

hi,



i have 5 questions i need the
complete solutions with their final results. is there anyonecouldhelp
me, i would appreciate that.



1)
2600 rev/min is equivalent to which of the following?
1. 273 rad/s
2. 43.3 rad/s
3. 2600 rad/s
4. 60 rad/s


2)

A 0.30-m-radius automobile tire rotates how many rad afterstartingfrom rest and accelerating at a constant 2.0 rad/s2 over a5.0-sinterval?


3)

A Ferris wheel starts at rest and builds up to a final angularspeedof 0.70 rad/s while rotating through an angular displacementof 4.9rad. What is its average angular acceleration?


4)

A Ferris wheel, rotating initially at an angular speed of0.50rad/s, accelerates over a 7.0-s interval at a rate of 0.040rad/s2.What is its angular speed after this 7-s interval?


5)

A point on the rim of a 0.30-m-radius rotating wheel hasatangential speed of 4.0 m/s. What is the tangential speed ofapoint 0.20 m from the center of the same wheel?







thank you in advance

A wheel starts from rest and rotates about its axiswith constantangular acceleration. After 9.7 s have elapsed, ithas rotatedthrough an angle of 15 radians. What is the angularacceleration ofthe wheel?

What is the angular velocity when the time t =9.7s?

What is the centripetal acceleration of apoint on thewheel a distance r = 0.25 m from the axis at t =9.7s?

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 250 N applied to the edge causes the wheel to have an angular acceleration of 0.940 rad/s^2. (a) What is the moment of inertia of the wheel? (b) What is the mass of the wheel? (c) If the wheel starts from rest, what is its angular velocity after 5.00 s have elapsed, assuming the force is acting during that time?

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