# HW15 - Thevalingam Donald – Homework 15 – Due midnight...

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Unformatted text preview: Thevalingam, Donald – Homework 15 – Due: Jan 16 2007, midnight – Inst: Eslami 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Howfarwillanobjectmovein9sifitsaverage speed during that time is 40 m / s? Answer in units of m. 002 (part 1 of 1) 10 points In order to qualify for the finals in a racing event, a race car must achieve an average speed of 252 km / h on a track with a total length of 1800 m. If a particular car covers the first half of the track at an average speed of 216 km / h, what minimum average speed must it have in the second half of the event in order to qualify? Answer in units of km / h. 003 (part 1 of 3) 10 points A ball is dropped from rest at point O . After falling for some time, it passes by a window of height 3 . 1 m and it does so during time 0 . 31 s. The acceleration of gravity is 9 . 8 m / s 2 . O A B 3 . 1 m x y The ball accelerates all the way down; let v A be its speed as it passes the window’s top A and v B its speed as it passes the window’s bottom...
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HW15 - Thevalingam Donald – Homework 15 – Due midnight...

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