{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

11_09_Rotational_Energy

# 11_09_Rotational_Energy - 11/9 Rotational Energy Today...

This preview shows pages 1–4. Sign up to view the full content.

11/9 Rotational Energy / Today: Torque and Energy / Presentation “Pulling a Disk” / Upcoming presenters please see me / Holiday Monday!!! No Lab Next Week!!! / HW “Torque with acceleration” Due Wednesday 11/14 / HW “Rotational Energy” Due Thursday 11/15

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Find the acceleration of the disk, both angular and CM. No friction W E,D N F,D T S,D a = F net = α = τ net = T = ma a = T m τ net = I α F net = ma Tr = 1 / 2 mr 2 α I disk = 1 / 2 mr 2 (I ring = mr 2 ) r α = 2T m Does a = r α ? What does “no” mean? Slipping! Which way? = a R W E,D N F,D T S,D a = F net = α = τ net = τ net = I α F net = ma f F,D ? r r No slipping allowed due to friction Does a = r α ?
No slipping allowed due to friction I disk = 1 / 2 mr 2 (I ring = mr 2 ) W E,D N F,D T S,D a = F net = α = τ net = τ net = I α F net = ma f F,D ? F net = ma = T + f τ net = I α = rT - rf τ net = 1 / 2 mr 2 = r(T - f) a r r α = a r 1 / 2 ma = T - f ma = T + f

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 7

11_09_Rotational_Energy - 11/9 Rotational Energy Today...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online