CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

When a person throws a meter stick, it is found that the centre of the stick is moving with a speed of 10 m/s vertically upward & the left end of the stick with a speed 20 m/s vertically upward. Then, the angular speed of the stick is
  1. 20 rad/sec
  2. 10 rad/sec
  3. 30 rad/sec
  4. None of the these


Solution

The correct option is A 20 rad/sec

Assume angular velocity of the stick is ω rad/s in clockwise direction.
For meter stick, L=1 m
Speed of left end of the stick VA=20 m/s
As we know,
VA=V0+ω×rAO   {rAO=12^i}
20^j=10^j+ω(^^k)×12(^i)
10^j=ω2(^k×^i)[^k×^i=^j]
10^j=ω2^j
ω=20 rad/s
[ω is positive hence, assumed direction is correct.]

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
QuestionImage
QuestionImage
View More...


People also searched for
QuestionImage
QuestionImage
View More...



footer-image