# hw 13 - Patel (pnp223) homework 13 Turner (92160) This...

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Patel (pnp223) – homework 13 – Turner – (92160) 1 This print-out should have 9 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points A hunter wishes to cross a river that is 1 . 7 km wide and that ±ows with a speed oF 6 . 2 km / h. The hunter uses a small powerboat that moves at a maximum speed oF 12 km / h with respect to the water. What is the time necessary For crossing iF the boat moves directly across the river? Draw the vectors to scale on a graph to deter- mine the answer. Answer in units oF min. 002 10.0 points A car is moving at constant speed on the Freeway. The driver sees a patrol car at time t 1 and rapidly slows down by around 10 miles per hour. AFter continuing at this speed For a Few minutes, the driver at time t 2 returns to the earlier constant speed. Let us plot the acceleration oF the car as a Function oF time; take the Forward direction oF motion as positive. Which graph correctly describes the car’s acceleration

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## This note was uploaded on 07/11/2009 for the course PHY 92160 taught by Professor Turner during the Spring '09 term at University of Texas at Austin.

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hw 13 - Patel (pnp223) homework 13 Turner (92160) This...

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