A skater has rotational inertia 5.31 kg m² with hisarms outstretched and a baseball glove on eachhand; the pocket of each glove is 123 cm from hisrotation axis. He's spinning with angular velocitypointing upward and with magnitude 0.950 rev/s.He catches a 146-g baseball moving at 19.7 m/sperpendicular to his arms and heading straighttoward the pocket of his glove.Part AFind the skater's subsequent spin rate if he catches the ball with his left hand.Express your answer with the appropriate units.ΜΑ?Wf left = 0.27revSSubmit Previous Answers Request Answer× Incorrect; Try Again; 18 attempts remainingPart BFind the skater's subsequent spin rate if he catches the ball with his right hand.Express your answer with the appropriate units.НА?Wf right =1.55revτοSSubmitPrevious Answers Request Answer

Step 1:Moment of inertia is 5.31kgm2Distance of the ball is 123cm is 1.23mMass of the ball is 146g…

Answered: A skater has rotational inertia 5.31 kg…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A physics professor stands at the centre of a frictionless turntable with arms outstretched and a 9.75 kg dumbbell in each hand as shown in the following figure. He is set rotating about the vertical axis at 0.95 revolution per second. Find his final angular velocity if he pulls the dumbbells into his stomach. His moment of inertia (without the dumbbells) is 3.4 kgm with arms outstretched and 2.3 kgm with his hands at his stomach. The dumbbells are 1.3 m from the axis initially and 0.2 mat the end. Dumbbell Dumbbell Professor (not a dumbbell) BEFORE AFTER Insert the final angular velocity in revolutions per second correct up to at least a third decimal place.
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5) In ice figure skating, a couple execute a “top” (see picture). The centre of mass of the woman (58 kg) is situated 1.3 m from the axis of rotation which is vertical and passes through the centre of mass of the man (85 kg). They are spinning at a constant angular velocity equal to 3.1415 rad/s and the man and woman have moments of inertia, about their own centres of mass, equal to 1.6 and 2.5 kg.m2 respectively. Then the woman grabs the neck of the man. At this point, her moment of inertia decreases to 1.4 kg.m2 and her body centre of gravity is 0.9 m from the axis of rotation. Determine the new angular velocity. Hints: This is a conservation of angular momentum problem, and needs the parallel axis theorem to determine moments of inertia about the axis of rotation. The skaters are moving as one body with one angular velocity, but they each have their own moments of inertia given relative to their own CoMs. For the man, that’s fine…the axis they’re rotating about passes through his…
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