PHYS171_f11_exam_3_example - PHYS171 Exam 3 practice Fall...

Info iconThis preview shows pages 1–3. 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: PHYS171 Exam 3 practice Fall 2011 Name: _____________________ Student ID #: ________ 1 Short Answer Questions 1) You need to launch an object at sufficient velocity so that it entirely escapes the earths gravitation field (i.e., at escape velocity). To minimize the energy required it is better to (a) launch from the highest mountain accessible (b) launch from the deepest valley accessible (c) it doesnt matter, why? (5 points) 2) You have a slingshot that launches an object at a fixed velocity. Standing on the roof of this building, you must use it to launch your iPhone so that it lands on the ground below, at which point you can assume it comes instantly to rest. To minimize the risk of damage, should you (a) launch it straight up (b) launch it straight down (c) launch it horizontally (d) it does not matter. Why? (5 points) 3) A baseball bat is 1 meter long, and weighs 0.75 kg. What is the effective moment of intertia when a baseball player swings the bat (10 points)? 4) One cylinder rolls down an inclined plane without slipping and a second identical cylinder slides down the same inclined plane without friction. Which cylinders center of mass is moving faster when it reaches the bottom of the inclined plane. (a) rolling of (b) sliding. (5 points) PHYS171 Exam 3 practice...
View Full Document

This note was uploaded on 12/29/2011 for the course PHYSICS 171 taught by Professor La porta during the Fall '11 term at Maryland.

Page1 / 9

PHYS171_f11_exam_3_example - PHYS171 Exam 3 practice Fall...

This preview shows document pages 1 - 3. Sign up to view the full document.

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