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A tag for questions about the mechanical interactions of rotating objects, including torque and angular momentum.

2 votes
2 answers
210 views

Work-Energy Theorem but Work is $F.S_{COM}$ (Extended)

From the definition of Work Done, we know it is $\vec F . \vec s$ , where $\vec s$ is displacement of point of application of force. Everything was alright until I read these texts from Kleppner and K …
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  • 367
1 vote
3 answers
162 views

Why does a ball tied to a spring move outwards when rotated (ground frame)?

Suppose a bob or a ball is tied to a spring which in turn is pivoted to a certain point on a table as shown, if the ball is given velocity $v_o$ perpendicular to spring it moves in circular motion an …
PinkAura's user avatar
  • 367
2 votes
1 answer
236 views

At what $ω$ would the dust particles fly off the tilted rotating disc?

I've been struggling with question below: "A metal disc of radius R can rotate about the vertical axis passing through its centre. The top surface of the disc is uniformly covered with dust particle …
PinkAura's user avatar
  • 367