Physics 15200- HW10

Physics 15200- HW10 - engine at t = 1 . 78 s. Answer in...

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lai (yl8859) – HW10 – Ross – (15200) 1 This print-out should have 7 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points A 3 . 6 kg block moving along the x axis is acted upon by a single horizontal Force that varies with the block’s position according to the equation F x = a x 2 + b , where a = 4 N / m 2 , and b = - 1 . 8 N. At 1 . 7 m, the block is moving to the right with a speed oF 3 . 5 m / s. Determine the speed oF the block at 2 . 6 m. Answer in units oF m / s. 002 (part 1 oF 3) 10.0 points A 1710 kg car accelerates uniFormly From rest to 11 . 1 m / s in 4 . 6 s. ±ind the work done on the car in this time interval. Answer in units oF kJ. 003 (part 2 oF 3) 10.0 points ±ind the average power delivered by the en- gine in this time interval. Answer in units oF hp. 004 (part 3 oF 3) 10.0 points ±ind the instantaneous power delivered by the
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Unformatted text preview: engine at t = 1 . 78 s. Answer in units oF hp. 005 (part 1 oF 2) 10.0 points A 313 kg crate is pulled along a level sur-Face by an engine. The coecient oF kinetic Friction between the crate and the surFace is . 35. The acceleration oF gravity is 9 . 8 m / s 2 . How much power must the engine deliver to move the crate at a constant speed oF 4 . 3 m / s? Answer in units oF w. 006 (part 2 oF 2) 10.0 points How much work is done by the engine in 2 . 51 min? Answer in units oF J. 007 10.0 points A rain cloud contains 3 . 59 10 7 kg oF water vapor. The acceleration oF gravity is 9 . 8 m / s 2 . How long would it take For a 3 . 4 kW pump to liFt the same amount oF water to an altitude oF 17000 m? Answer in units oF years....
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