Questions
A bob of mass m is attached to one end of a string of length l. This is kept in the horizontal position and released from the rest. At what angle from vertical will the tension in the string be equal to the weight in magnitude ?
detailed solution
Correct option is B
From figure, T−mgcosθ=mv2l∴ T=mgcosθ+mv2/l or mg=mgcosθ+mv2/l or mg=mgcosθ+ml(2g)(l−h)∴ 1=cosθ+2cosθ1=3cosθ∴ cosθ=1/3 or θ=cos−1(1/3)Talk to our academic expert!
Similar Questions
A pendulum of length / = l m is released from . The rate of change of speed of the bob at is (g = 10 )
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
