{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

CW13-solutions

CW13-solutions - kuehner(rjk679 CW13 Mackie(20211 This...

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

View Full Document Right Arrow Icon
kuehner (rjk679) – CW13 – Mackie – (20211) 1 This print-out should have 5 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points A roller coaster cart oF mass m = 333 kg starts stationary at point A, where h 1 = 30 . 8 m and a while later is at B , where h 2 = 11 . 6 m. The acceleration oF gravity is 9 . 8 m / s 2 . h h A B 1 2 What is the speed oF the cart at B , ignoring the e±ect oF Friction? Correct answer: 19 . 399 m / s. Explanation: By conservation oF energy Δ U + Δ K = 0 ( mg h 2 - 1 ) + 1 2 mv 2 = 0 mg ( h 1 - h 2 ) = 1 2 2 Solving For v , v = r 2 g ( h 1 - h 2 ) = R 2 (9 . 8 m / s 2 ) (30 . 8 m - 11 . 6 m) = 19 . 399 m / s 002 (part 1 oF 3) 10.0 points A block starts at rest and slides down a Fric- tionless track except For a small rough area on a horizontal section oF the track (as shown in the fgure below). It leaves the track horizontally, ²ies through the air, and subsequently strikes the ground. The acceleration oF gravity is 9 . 8 m / s 2 .
Background image of page 1

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

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

{[ snackBarMessage ]}

Page1 / 3

CW13-solutions - kuehner(rjk679 CW13 Mackie(20211 This...

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

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