Physics practice problem... please answer b- BOTH ds thanks NameIn their physics classroom, students want to hang a heavy sign of mass Ms and length Ls asshown in the figure below. The sign makes an angle 0 with the wall (do NOT assume thisangle is 90°). Without any support, the sign would rotate clockwise while its pivot wouldremain connected to the wall. The students can connect support cable vertically from one ofthe hooks above the sign as indicated in the diagram.ВMass = MsLength = LsPivot(a) Rank the three hook locations according to the amount of tension the support cablewould experience if the students decided to support the sign from that location. Use 1 forthe least tension and 3 for the greatest tension. If two locations would have the sametension, give them the same ranking.2Location ALocation BLocation CBriefly explain your reasoning. [4 pts]T- FRsin oofRotationT, theForce v blcB/c thediatefrom thearisItinverseRelationFNFAFB Fcan↑ ↑ ↑Fg(b) The students hang the sign with a cable, but the cable breaks and the sign rotatesclockwise. Find the initial angular acceleration of the sign. The moment of inertia of the signabout the pivot is - M,L. Keep your answer in terms of Ms, Ls, 0, and any other physicalconstants.We are now going to assume that 0 = 90°. Answers should be kept in terms of of m, Ms, Ls,0, t, and any other physical constants.(c) The students repeat the experiment, but this time, before the string breaks, a block ofmass, m, is placed at the right end of the sign. What is the new moment of inertia of thesign-block system?(d) Find the new angular acceleration of the sign-block system.(d) Assuming the block starts from rest, what will the block's angular velocity be after time,t?

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Name_ n their physics classroom, students want to hang a heavy sign of mass Ms and length Ls as shown in the figure below. The sign makes an angle 0 with the wall (do NOT assume this angle is 90°). Without any support, the sign would rotate clockwise while its pivot would emain connected to the wall. The students can connect support cable vertically from one of he hooks above the sign as indicated in the diagram. A B C Mass = Ms Length = Ls Pivot a) Rank the three hook locations according to the amount of tension the support cable would experience if the students decided to support the sign from that location. Use 1 for he least tension and 3 for the greatest tension. If two locations would have the same ension, give them the same ranking.

Name_ n their physics classroom, students want to hang a heavy sign of mass Ms and length Ls as shown in the figure below. The sign makes an angle 0 with the wall (do NOT assume this angle is 90°). Without any support, the sign would rotate clockwise while its pivot would emain connected to the wall. The students can connect support cable vertically from one of he hooks above the sign as indicated in the diagram. A B C Mass = Ms Length = Ls Pivot a) Rank the three hook locations according to the amount of tension the support cable would experience if the students decided to support the sign from that location. Use 1 for he least tension and 3 for the greatest tension. If two locations would have the same ension, give them the same ranking.

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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Mechanisms of heat transfer

Heat transfer is an essential discipline in thermal engineering that deals with the transfer, conversion, usability, and creation of heat or thermal energy. Transfer of heat occurs through various mechanisms like conduction, convection, radiation, and change of phases. All these mechanisms have distinct characteristics, but these mechanisms can simultaneously occur in an identical system.

Question

Physics practice problem... please answer b- BOTH ds

thanks

Name
In their physics classroom, students want to hang a heavy sign of mass Ms and length Ls as
shown in the figure below. The sign makes an angle 0 with the wall (do NOT assume this
angle is 90°). Without any support, the sign would rotate clockwise while its pivot would
remain connected to the wall. The students can connect support cable vertically from one of
the hooks above the sign as indicated in the diagram.
В
Mass = Ms
Length = Ls
Pivot
(a) Rank the three hook locations according to the amount of tension the support cable
would experience if the students decided to support the sign from that location. Use 1 for
the least tension and 3 for the greatest tension. If two locations would have the same
tension, give them the same ranking.
2
Location A
Location B
Location C
Briefly explain your reasoning. [4 pts]
T- FRsin o
of
Rotation
T, the
Force v blc
B/c the
diate
from the
aris
It
inverse
Relation
FN
FA
FB Fc
an
↑ ↑ ↑
Fg
(b) The students hang the sign with a cable, but the cable breaks and the sign rotates
clockwise. Find the initial angular acceleration of the sign. The moment of inertia of the sign
about the pivot is - M,L. Keep your answer in terms of Ms, Ls, 0, and any other physical
constants.
We are now going to assume that 0 = 90°. Answers should be kept in terms of of m, Ms, Ls,
0, t, and any other physical constants.
(c) The students repeat the experiment, but this time, before the string breaks, a block of
mass, m, is placed at the right end of the sign. What is the new moment of inertia of the
sign-block system?
(d) Find the new angular acceleration of the sign-block system.
(d) Assuming the block starts from rest, what will the block's angular velocity be after time,
t?

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