cw3 - patel(kp9583 CW3 Mackie(20211 This print-out should...

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

View Full Document Right Arrow Icon
patel (kp9583) – CW3 – Mackie – (20211) 1 This print-out should have 3 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. DEADLINE IS CENTRAL TIME! 001 10.0 points Two particles are at the same point at the same time, moving in the same direction. Par- ticle A has an initial velocity oF 8 . 7 m / s and an acceleration oF 2 . 9 m / s 2 . Particle B has an initial velocity oF 2 . 5 m / s and an acceleration oF 4 . 8 m / s 2 . At what time will B pass A? Correct answer: 6 . 52632 s. Explanation: Basic Concept: s = s 0 + v 0 t + 1 2 at 2 Solution: ±or particle A, s 0 A = 0, so s A = v 0 A t + 1 2 a A t 2 ±or particle B, s 0 B = 0, so s B = v 0 B t + 1 2 a B t 2 When B overtakes A, the positions are the same, so v 0 A t + 1 2 a A t 2 = v 0 B t + 1 2 a B t 2 2 v 0 A t + a A t 2 = 2 v 0 B t + a B t 2 a A t 2 - a B t 2 + 2 v 0 A t - 2 v 0 B t = 0 t ( a A t - a B t + 2 v 0 A - 2 v 0 B ) = 0 The solutions are t = 0 which tells us that they were at the same position when t=0 and
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/10/2009 for the course PHYSICS 2021 taught by Professor Mihalisin during the Fall '09 term at Temple.

Page1 / 2

cw3 - patel(kp9583 CW3 Mackie(20211 This print-out should...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online