2004APFinalFRSolutionsv2

# 2004APFinalFRSolutionsv2 - PHYSICS AP FALL SEMESTER...

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

PHYSICS AP FALL SEMESTER 2003-2004 FINAL EXAMINATION VERSION 2 PART TWO: FREE RESPONSE QUESTIONS SOLVE THE FOLLOWING PROBLEMS. WRITE YOUR ANSWERS ON THE ANSWER SHEET. DO NOT WRITE ON THIS PAPER. IF THE ANSWER IS A VECTOR, REPORT MAGNITUDE AND DIRECTION. An incredibly long, thin rod has linear charge density λ . One end of the rod is located at point B. Point A is located along the line of the rod, a distance d from the end. 1) What is the strength of the electric field at point A? 2 2 2 2 0 E d L d d k dq k dr dE r r k dr k dr k k E dE d r r + = = - - = = = - A solid sphere of mass m = 50 grams and radius r = 1.25 cm is placed on a 30º ramp and released from rest. The sphere then rolls without slipping. 2) What net force acts on sphere as it rolls? ( 29 ( 29 [ ] 2 2 sin 2 : 5 2 2 2 5 5 5 2 7 sin sin sin 5 5 5 5 sin 0.05 9.8 sin30 0.175 7 7 f f f f f F mg F ma F r I a object rolls I mr r a F r I mr mar F ma r mg F mg ma ma mg ma F ma mg N down the ramp θ τ α = - = = = = =  = = = =   - = - = = = = = = A solid, infinitely long, uniformly charged, nonconducting cylinder has linear charge density - and radius R . A narrow tunnel is drilled through the cylinder through its center, as shown in cross section at right. The tunnel is so narrow that

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 / 3

2004APFinalFRSolutionsv2 - PHYSICS AP FALL SEMESTER...

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

View Full Document
Ask a homework question - tutors are online