# 101101 - R v a R v v a v t a R t v 2 = = ± = ± Physics...

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

Physics 121 11/01/10 Prof. E. F. Redish 1 11/01/10 1 Physics 121 *playing the original cover by Tom Rush 11/01/10 2 Physics 121 11/01/10 3 Physics 121

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

View Full Document
Physics 121 11/01/10 Prof. E. F. Redish 2 11/01/10 Physics 121 4 11/01/10 8 Physics 121 t 1 t 2 t 3 t 4 t 5 t 6 R Period = time to go around once T = 4 ( t 3 t 1 ) (Why?) Speed = 2 ± R / T (Why?) t 7 t 8 11/01/10 9 Physics 121 t r v ± ± = ± ± t 1 t 2 1 r ± 2 r ± r ± ± 1 2 r r r ± ± ± ± = ² dt r d v ± ± =
Physics 121 11/01/10 Prof. E. F. Redish 3 11/01/10 10 Physics 121 t 1 t 2 1 v ± 2 v ± v ± ± 1 2 v v v ± ± ± ± = ² t v a ± ± = ± ± dt v d a ± ± = 11/01/10 11 Physics 121 t 1 t 2 R ± ± ± 1 r ± 1 r ± 2 r ± 2 r ± 2 v ± 2 v ± 1 v ± 1 v ± v ± ± r ± ± 11/01/10 12 Physics 121 ± ± R R v ± t v v a ² t Similar triangles imply

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: R v a R v v a v t a R t v 2 = = ± = ± Physics 121 11/01/10 Prof. E. F. Redish 4 11/01/10 13 Physics 121 r R v a r R r r R v a ˆ ector position v of direction in r unit vecto ˆ ector position v center in to pointing 2 2 ± = = = = = ± ± ± 11/01/10 14 Physics 121 11/01/10 15 Physics 121 r R mv F r R v m F r R v a m F a net net net ˆ ˆ ˆ 2 2 2 ± = ± = ± = = ± ± ± ± ± always in order for the object to move in a circle with constant speed. Therefore, to do this, we need a net force. A(n inward) radial net force is needed to maintain circular motion....
View Full Document

{[ snackBarMessage ]}

### Page1 / 4

101101 - R v a R v v a v t a R t v 2 = = ± = ± Physics...

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

View Full Document
Ask a homework question - tutors are online