HW2 - Niu(qn269 HW02 Tsoi(58020 This print-out should have...

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1 This print-out should have 22 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 Given: The acceleration oF gravity on Earth is 9 . 8 m / s 2 . Consider a ball thrown up From the ground (the point O). It passes a window (the seg- ment AB) in the time interval 0 . 262 s (see the fgure). The points in the fgure represent the sequential order, and are not drawn to scale. The distance AB = 1 . 17 m. O C B A 1 . 17 m b b b b b b b b b b b x y ±ind the average speed as the ball passes the window. Answer in units oF m / s. 002 (part 2 oF 3) 10.0 points What is the magnitude oF the decrease oF the velocity From A to B? Answer in units oF m / s. 003 (part 3 oF 3) 10.0 points IF the ball continues its path upward without obstruction, fnd the travel time between B and C, where point C is at the ball’s maximum height. Answer in units oF s. 004 (part 1 oF 2) 10.0 points A ball is thrown upward. Its initial verti- cal speed v 0 , acceleration oF gravity g , and maximum height h max are shown in the fgure below. Neglect: Air resistance. The acceleration oF gravity is 9 . 8 m / s 2 . b b b b b b b b b b b b b b b b b b b b v 0 9 . 8 m / s 2 h max What is its maximum height, h max (in terms oF the initial speed v 0 )? 1. h max = v 2 0 2 g 2. h max = 5 v 2 0 2 2 g 3. h max = v 2 0 2 g 4. h max = 3 v 2 0 2 g 5. h max = 3 v 2 0 2 2 g 6. h max = v 2 0 g 7. h max = 5 v 2 0 8 g 8. h max = v 2 0 4 g 9. h max = 3 v 2 0 4 g 005 (part 2 oF 2) 10.0 points ±ind the speed v A oF the ball (in terms oF the initial speed v 0 ) as the ball passes a point A , which is at one quarter oF the maximum height h max 4 . 1.
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This note was uploaded on 09/01/2009 for the course PHY M taught by Professor Staff during the Spring '09 term at University of Texas.

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HW2 - Niu(qn269 HW02 Tsoi(58020 This print-out should have...

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