Physics II workshop_Part_13

Physics II workshop_Part_13 - (b) Find the velocity when...

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28 8. Click in the acceleration-time graph. Drag across a region when the ball is out of your hand and determine the average by using Statistics (Analysis menu or the “Stat” button). Record the average value, tell the name of this quantity and its units. Also record the standard deviation. 9. Do your results of the three previous parts agree? For example, do they all give the same value of initial velocity, etc?
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29 Some 1D kinematics problems: 1. Indianapolis race cars make a rolling start. At the beginning of the race they are moving at 120 mph and they accelerate to 250 mph in 4.0 seconds. (a) What is the acceleration of the cars? (b) How far do they travel in this acceleration phase? Objects falling near earth with no forces acting except gravity have a downwards acceleration of 9.8 m/s 2 . 2. A ball is thrown upwards at 9.0 m/s toward a platform located 4.1 m above the point where you release the ball. Air resistance is negligible. (a) Find the time taken to reach the platform.
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Unformatted text preview: (b) Find the velocity when the ball reaches the platform. 3. You notice a falcon diving past the Kodak office building. You see it pass 5 stories in 1.5 seconds, and at the end has a downwards velocity of 15 m/s. (a) What is the acceleration of the bird? (b) What was the initial speed of the bird? 4. Your coop job is with a research group studying ozone depletion. Your group will launch a rocket that has a mass spectrometer in its nose cone. You are assigned the task of determining the acceleration of the rocket so that the equipment can be designed to survive. The rocket you will have has a burn time of 30 seconds, and can be assumed to produce constant acceleration. After the fuel is exhausted the rocket will enter free-fall. You are told that the total time of flight of the rocket must be 5.0 minutes. What is the acceleration of the rocket when the engine is on, and what is the maximum altitude of the rocket? BONUS Is this problem realistic? Where is the ozone layer anyway?...
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Physics II workshop_Part_13 - (b) Find the velocity when...

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