# hw02 - s 2 006 10.0 points A rocket sled For testing...

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Ross (jr6585) – HW02 – Ross – (08152) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 3) 10.0 points The position oF a soFtball tossed vertically upward is described by the equation y = c 1 t - c 2 t 2 , where y is in meters, t in seconds, c 1 = 10 . 5 m / s, and c 2 = 7 . 7 m / s 2 . ±ind the ball’s initial speed v 0 at t 0 = 0 s. Answer in units oF m / s. 002 (part 2 oF 3) 10.0 points ±ind its velocity at t = 1 . 03 s. Answer in units oF m / s. 003 (part 3 oF 3) 10.0 points ±ind its acceleration at t = 1 . 03 s. Answer in units oF m / s 2 . 004 (part 1 oF 2) 10.0 points The velocity oF a particle moving along the x axis varies in time according to the expression v ( t ) = ( α - β t 2 ) where α = 58 . 3 m / s, β = 5 . 44 m / s 3 , and t is in seconds. ±ind the average acceleration in the time interval From t = 0 to 2 . 37 s. Answer in units oF m / s 2 . 005 (part 2 oF 2) 10.0 points Determine the acceleration oF the particle at t f = 2 . 37 s. Answer in units oF m
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Unformatted text preview: / s 2 . 006 10.0 points A rocket sled For testing equipment under large accelerations starts at rest and acceler-ates according to the expression a = (4 . 5 m / s 3 ) t + (7 . 9 m / s 2 ) . How Far does the sled move in the time interval t = 0 to t = 1 . 6 s ? Answer in units oF m. 007 10.0 points A student throws a baseball at a large gong 67 m away and hears the sound oF the gong 1 . 57038 s later. The speed oF sound in air is 330 m / s. What was the average speed oF the base-ball on its way to the gong? (±or simplicity, assume its trajectory to be a straight line.) Answer in units oF m / s. 008 10.0 points A man jogs at a speed oF 1 . 4 m / s. His dog waits 1 . 3 s and then takes o² running at a speed oF 3 m / s to catch the man. How Far will they have each traveled when the dog catches up with the man? Answer in units oF m....
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## This note was uploaded on 01/31/2009 for the course PHYS 2206 taught by Professor Ross during the Spring '09 term at IUPUI.

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