Questions
A metre stick of mass 400 gm is pivoted at one end and it is hanging freely .If the rod is displaced through an angle 60o. The increase in its potential energy is
detailed solution
Correct option is D
When the rod is displaced through an angle θ its center of gravity is increased to a height BA as shown in fig.(7) Le OA=x. From ΔOAC, we get x(1/2)=cos60∘ or 2x=12 or x=14m From figure OB=12m ∴ BA=12m−x=12m−14m=14m Change in potential energy =mg×(BA) =0⋅4×10×(1/4)=1 jouleTalk to our academic expert!
Similar Questions
A simple pendulum is swinging in a vertical plane. The ratio of its potential energies when it is making angles and with the vertical is,
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 Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
