ws02 - Worksheet 2 One-dimensional kinematics Questions 1...

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Worksheet 2: One-dimensional kinematics Questions 1. Yes, it is possible for an object to have zero velocity and be accelerating at the same time. 2. Yes, it is possible to increase speed while decreasing acceleration. 3. Ball C will reach the bottom first. The reason being is that ball C will accelerate more at the beginning, and hence will have a greater average velocity than ball A. Since both tracks are the same length, ball C will reach the bottom first. Problems 1. A diver jumps into the pool with initial upward velocity 2 m/s at a height of 5 m . Once she lands, her deceleration is 30 m/s . (a) See graph. . Figure 1: Diver jumps into a pool. x = 0 denotes the boundary between air and water (b) The highest point the diver is above the pool is 5 . 6 m (c) The velocity of the diver hitting the water is - 10 m/s 1
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(d) The diver will stop at a height below the surface of
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Unformatted text preview: -1 . 67 m 2. Steve Austin chases a car: (a) See graph. Figure 2: Steve Austin Chases a car (b) See graph. (c) Steve does not pass the car, the closest he gets is 10m 3. Rob and Dave run a 100 m race. (a) See Graph. Figure 3: Rob and Dave run a race. (b) a rob = 5 . 6 m/s 2 and a dave = 3 . 9 m/s 2 (c) v ron = 11 . 1 m/s and v dave = 11 . 8 m/s 2 (d) At 6 seconds, Rob is ahead by 2 . 4 m . 4. A model rocket is fred vertically. (a) See graph. Figure 4: A rocket launches into the air. (b) The highest point o± the rocket is 101 m . (c) The rocket spends 13 sec in the air. (d) The velocity o± the rocket when it lands is 44 . 5 m/s . 5. Gravity on Planet Oski. (a) The gravitational acceleration is about 30 m/s 2 (b) The height o± the cli² is about 59 m 3...
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