lecture18_09

# lecture18_09 - the top of the circle • The minimum speed...

This preview shows pages 1–2. Sign up to view the full content.

1 Announcements 1. HW7 due March 18. 2. Pick up exam 1 in NPB 1100 or before/after lecture. 2. Solutions to even number questions in textbook starting Chapter 6, numerical values will be posted in the HW solutions page. 3. Prof. Reitze’s office hour for Friday March 6 changed to 3:30 to 4:30 pm 4. Week of March 17 and 19 (after spring break) Prof. Yelton will give lectures Profs. Chan and Reitze will not hold offices hours in this week t v r t v r t v r Direction of Tangential Velocity v t and angular frequency ω Right Hand Rule Angular velocity is a vector t ω r out of screen R V t = R V t = magnitude t v r t v r t v r And the other way… Into Screen t r Centripetal Acceleration – The magnitude of the centripetal acceleration is given by – This direction is toward the center of the circle 2 2 R R V a t c = = t v r c a r Vertical Circle • Look at the forces at

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.

Unformatted text preview: the top of the circle • The minimum speed at the top of the circle for the cars to remain in contact with the track is gR v top = Homework problem in webassign 2 Direction of ν t and a t are the same If rotation is speeding up t t a v r r , t t a v r r , t t a v r r , Tangential acceleration in circular motion Direction of ν t and a t are opposite if rotation is slowing down t v r t v r t v r t a r t a r t a r t a r c a r • The tangential component of the acceleration is due to changing speed • The centripetal component of the acceleration is due to changing direction • Total acceleration can be found from these components 2 C 2 t a a a + = Total Acceleration t a r c a r total a r Have a nice spring break!...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

lecture18_09 - the top of the circle • The minimum speed...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online