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Physics 15200- HW2

# Physics 15200- HW2 - s 2 005(part 1 oF 2 10.0 points The...

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lai (yl8859) – HW02 – Ross – (15200) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A man jogs at a speed of 1 . 8 m / s. His dog waits 1 . 9 s and then takes off running at a speed of 2 . 7 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. 002 (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 = 5 . 43 m / s, and c 2 = 1 . 99 m / s 2 . Find the ball’s initial speed v 0 at t 0 = 0 s. Answer in units of m / s. 003 (part 2 of 3) 10.0 points Find its velocity at t = 0 . 551 s. Answer in units of m / s. 004 (part 3 of 3) 10.0 points Find its acceleration at t = 0 . 551 s. Answer in units of m /
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Unformatted text preview: / s 2 . 005 (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 = 55 . 4 m / s, β = 4 . 3 m / s 3 , and t is in seconds. ²ind the average acceleration in the time interval From t = 0 to 2 . 56 s. Answer in units oF m / s 2 . 006 (part 2 oF 2) 10.0 points Determine the acceleration oF the particle at t f = 2 . 56 s. Answer in units oF m / s 2 . 007 10.0 points A rocket sled For testing equipment under large accelerations starts at rest and acceler-ates according to the expression a = (4 . 6 m / s 3 ) t + (4 . 4 m / s 2 ) . How Far does the sled move in the time interval t = 0 to t = 1 . 3 s ? Answer in units oF m....
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