OH-03-problems - mohammed (omm269) – OH-03 – bradley...

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Unformatted text preview: 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 10.0 points 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 10m v 10m 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 10.0 points 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 (part 1 of 3) 10.0 points Neglect: Air friction. Your teacher tosses a basketball. The ball gets through the hoop (lucky shot). mohammed (omm269) – OH-03 – bradley – (19101) 2 b ℓ 2 . 292m 3 . 048m 1 6 m / s 5 7 ◦ b b b b b b b b b b b b b b b b b b b b Figure: Not drawn to scale....
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OH-03-problems - mohammed (omm269) – OH-03 – bradley...

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