solution-hw12

solution-hw12 - lai (yl8859) HW12 Ross (15200) 1 This...

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

View Full Document Right Arrow Icon

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

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

Unformatted text preview: lai (yl8859) HW12 Ross (15200) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 (part 1 of 3) 10.0 points A block is pushed against the spring with spring constant 9 . 1 kN / m (located on the left- hand side of the track) and compresses the spring a distance 4 . 6 cm from its equilibrium position (as shown in the figure below). The block starts at rest, is accelerated by the compressed spring, and slides across a fric- tionless track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9 . 81 m / s 2 . b b b b b b b b b b b b 421 g 2 . 2m x 9 . 81m / s 2 v 9 . 1 kN / m 4 . 6 cm What is the speed v of the block when it leaves the track? Correct answer: 6 . 76297 m / s. Explanation: Let : g = 9 . 81 m / s 2 , m = 0 . 421 kg , k = 9100 N / m , v x = v , and d = 0 . 046 m . b b b b b b b b b b b b m h 4 . 53 m g 6 . 76 m / s k d Basic Concepts: Conservation of Me- chanical Energy U i = U f + K f , (1) since v i = 0 m/s....
View Full Document

This note was uploaded on 02/24/2011 for the course PHYS 152 taught by Professor Button during the Winter '08 term at IUPUI.

Page1 / 3

solution-hw12 - lai (yl8859) HW12 Ross (15200) 1 This...

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