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OH-03-problems - mohammed(omm269 OH-03 bradley(19101 This...

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mohammed(omm269)–OH-03–bradley–(19101) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0points A target lies flat on the ground 9 m from the side of a building that is 10 m tall, as shown below. The acceleration of gravity is 10 m / s 2 . Air resistance is negligible. A student rolls a 9 kg ball off the horizontal roof of the building in the direction of the target. 9 m 10 m v 10 m The horizontal speed v with which the ball must leave the roof if it is to strike the target is most nearly 1. v = 9 3 m/s. 2. v = 2 9 m/s. 3. v = 9 2 2 m/s. 4. v = 5 9 m/s. 5. v = 6 m/s. 6. v = 3 9 m/s. 7. v = 9 2 m/s. 8. v = 9 5 m/s. 9. v = 9 m/s. 10. v = 3 3 m/s. 002 10.0points The correct, general definitions of velocity and acceleration, in terms of position vector vectorr , are vectorv = dvectorr dt , and vectora = dvectorv dt . During a very short time interval, the velocity of an object changes from vectorv i to vectorv f , as shown. vectorv i vectorv f What is the approximate direction of the acceleration during this time interval? 1. 2. 3. 4. 003(part1of3)10.0points Neglect: Air friction. Your teacher tosses a basketball. The ball gets through the hoop (lucky shot).
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mohammed (omm269) – OH-03 – bradley – (19101) 2 2 . 292 m 3 . 048 m 16 m / s 57 Figure: Not drawn to scale. How long does it take the ball to reach its maximum height?
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