rotational mech--comprehension 1

A rod of length 2m moves in horizontal x-y plane .At any instant end a of the rod is at origin and has velocity vA=2i+vyj.the other end B aty the same instant is moving with velo=vB=2i+6j.the rod makes an angle of 30° with the x axis at this instant

a)find the mag of angular velocity of the rod
b)value of vy
c)the component of velocity of centre of mass inthe direction perpendicular to the rod at the given instant.

9 Answers

1
arpan sinha ·

r u sure about velocity of end B? question & fig contradict with each other...

1
Kaustab Sarkar ·

yes buddy...............its a fiitjee aits q

62
Lokesh Verma ·

Hint: Velocity of the two points on the rod with respect to each other in the direction of the rod is zero..

23
qwerty ·

yeah..or else the rod will break apart!!

106
Asish Mahapatra ·

@Kaustab:

What is velocity of B?
In Q uve mentiond 2i+6j while in fig uve shown 3i+6j

1
Kaustab Sarkar ·

welll tahts wat is der in q.....not a typo from my side......but take it as 2i + 6j

19
Debotosh.. ·

this question came twice in FIITJEE AITS last year !!

1
decoder ·

see this http://targetiit.com/iit-jee-forum/posts/aits-phaltu-question-783.html

1
Kaustab Sarkar ·

thanx decoder for that link

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