Questions
A force is acting at a point . The value of for which angular momentum about origin is conserved is
detailed solution
Correct option is B
Angular momentum will be conserved if net torque acting on the system about the origin becomes zero.Given force acting F→ = αi^+3j^+6k^-----(i)and r→ = 2i^-6j^-12k^ = -2(-i^+3j^+6k^)----(ii)If torque becomes zero then then cross product should become zero. that is the two vectors must be parallelTherefore, α2= 3-6=6-12⇒α=-1Talk to our academic expert!
Similar Questions
A body is placed on a horizontal frictionless surface. When a horizontal force F is applied on the body, it is observed that the body makes only translational motion. The which of the following points may be the positions of its centre of mass?
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
