Explain solution to problem 2 of AP physics Sample Questions repost

Mar 6th, 2015
DreamIt
Category:
Engineering
Price: $5 USD

Question description

I am reposting this question as I am still unclear on the answer I got - 

Here's the problem:

See this link for College Board Link to CB Sample questions. Go to PDF 161 or page 154. Question begins: "The diagram above shows a top view of a child of mass M..."

I think that answers A and C are wrong because moving the child in or out changes the velocity of the system (conservation of momentum?)  but I do not understand about rotational inertia. Is there a formula to help in examining this problem?

Tutor Answer

(Top Tutor) Daniel C.
(997)
School: UCLA
PREMIUM TUTOR

Studypool has helped 1,244,100 students

Summary
Quality
Communication
On Time
Value
ashleyisgod
Mar 14th, 2017
" Top quality work from this guy! I'll be back! "
Ask your homework questions. Receive quality answers!

Type your question here (or upload an image)

1826 tutors are online

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors