1,2, and 3 please! (last)(first)2) Starting from our conservation of energy equation, Wnet ext = AEtotal, plug in the typesof energy that are changing, and their formulas, until your expression includes theunknown vf and of of the block and spool.3) Since the thread is unravelling from the spool, and we know that r,*ospool = Vblock, use thisrelationship to eliminate wf, and solve for the final velocity of the block. Does it matchwhat you found earlier?oyloa vdoera sduatd III Using Conservation of Energy to solve problems.Just as we saw with linear motion, we can often use conservation of energy to solveproblems, if we're asking the right questions. The overall approach is exactly thesame as we used before, only now we have a new type of energy, RotationalKinetic energy which is given by the equation KEROt = Iw², so let's look at theexample of the block unravelling the spool of thread again.1) If we take our system of interest to include everything (the block, the spool,the thread and the Earth) As the block starts from rest, and falls down 1.2 mas indicated, what types of energies change in the system?Ah = 1.2 m

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2) Starting from our conservation of energy equation, Wnet ext = AEtotal, plug in the types of energy that are changing, and their formulas, until your expression includes the unknown vf and of of the block and spool. 3) Since the thread is unravelling from the spool, and we know that r,*ospool = Vblock, Use this relationship to eliminate of, and solve for the final velocity of the block. Does it match what you found earlier?

2) Starting from our conservation of energy equation, Wnet ext = AEtotal, plug in the types of energy that are changing, and their formulas, until your expression includes the unknown vf and of of the block and spool. 3) Since the thread is unravelling from the spool, and we know that r,*ospool = Vblock, Use this relationship to eliminate of, and solve for the final velocity of the block. Does it match what you found earlier?

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter8: Conservation Of Energy

Section: Chapter Questions

Problem 12PQ

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Topic Video

Question

1,2, and 3 please!

(last)
(first)
2) Starting from our conservation of energy equation, Wnet ext = AEtotal, plug in the types
of energy that are changing, and their formulas, until your expression includes the
unknown vf and of of the block and spool.
3) Since the thread is unravelling from the spool, and we know that r,*ospool = Vblock, use this
relationship to eliminate wf, and solve for the final velocity of the block. Does it match
what you found earlier?
oyloa v
doera sduatd

III Using Conservation of Energy to solve problems.
Just as we saw with linear motion, we can often use conservation of energy to solve
problems, if we're asking the right questions. The overall approach is exactly the
same as we used before, only now we have a new type of energy, Rotational
Kinetic energy which is given by the equation KEROt = Iw², so let's look at the
example of the block unravelling the spool of thread again.
1) If we take our system of interest to include everything (the block, the spool,
the thread and the Earth) As the block starts from rest, and falls down 1.2 m
as indicated, what types of energies change in the system?
Ah = 1.2 m

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