Questions
The end A of a thin rod AB of mass m and length l is hinged and the end B is attached to X string BC hanging from a ceiling. Just after the string is burnt
a
angular acceleration of the rod is zero
b
angular acceleration of the rod is g/l
c
angular velocity of the rod is g/l2
d
reaction at the hinge A is less than mg
detailed solution
Correct option is D
Just after the string is burnt, weight mg produces a moment about the hinge and clockwise angular acceleration α=mg l213ml2=3glSo a vertically upward pseudo force m.αl2 acts on the rod as shown in figure. Because of the action of this pseudo force, N becomes less than mg.Talk to our academic expert!
Similar Questions
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
Popular Books
HC Verma Part 1HC Verma Part 2RS AgarwalRD SharmaLakhmir SinghDK GoelSandeep GargTS GrewalNCERT solutions
Class 12 NCERT SolutionsClass 11 NCERT SolutionsClass 10 NCERT SolutionsClass 9 NCERT SolutionsClass 8 NCERT SolutionsClass 7 NCERT SolutionsClass 6 NCERT Solutions
