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# M3 Vertical circles watch

Mass is attached to one end of a rod and other end centre of circle.
Rod turns an angle theta from the bottom of the circle.

So if the circle has ... never mind I got it.
2. (Original post by AlmostNotable)
Mass is attached to one end of a rod and other end centre of circle.
Rod turns an angle theta from the bottom of the circle.

Resolving to find Tension I can get Tcos(theta)=mg and T=mgcos(theta)

Which is right and why?
I can't quite get what you're asking, but:

Means that if you resolve radially inwards, you get: where is the centripetal force.
3. (Original post by Zacken)
I can't quite get what you're asking, but:

Means that if you resolve radially inwards, you get: where is the centripetal force.
Do we need to know how to find escape velocity for M3?
4. (Original post by AlmostNotable)
Do we need to know how to find escape velocity for M3?
Nope.
5. Whut...?

Edit: Seems you got it
6. (Original post by Zacken)
Nope.
Why did I revise that then?
7. (Original post by AlmostNotable)
Why did I revise that then?
I dunno, you need to know it for U5 Edexcel physics.

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