Ph101-08&amp;09-1md2

# Ph101-08&amp;09-1md2 - Kuwait University – Science...

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Unformatted text preview: Kuwait University – Science College – Physics Dept. – PHYS101 Fall 2008 (20-December-08) I Part I: Questions Choose the correct answer 1. A ball of mass m is connected to one end of a rope and rotates in a vertical circle of radius R . If the tension in the rope at point A is T and the speed of the ball at that point is v , then, (a) mg T = (b) R mv T 2 = (c) R mv mg T 2 + = (b) R mv mg T 2 − = 2. An object slides on a frictionless surface between points A and B at heights and h 2 h , respectively. If its speed at point A equals gh , then its speed at B equals, (a) gh 2 (b) gh 2 (c) gh (d) 2 gh 3. A conservative force is applied to a particle as it moves between points A and B. If the work done by this force along paths 1 and 2 equals W 1 and W 2 , respectively, then, (a) (b) 2 1 W W > 2 1 W W = (c) 2 1 = = W W (d) 2 1 W W − = 4. The system shown consists of two massless pulleys and a block of weight W . The magnitude of the applied force F r required to move the weight upward at constant speed is, (a) 3 W F = (b) W F 2 = (c) W F = (d) 2 W F = Part II: Problems Solve the following problems 1. A pilot of mass 80 kg drives an airplane in an arc of a vertical circle of radius 1 km as shown in...
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Ph101-08&amp;09-1md2 - Kuwait University – Science...

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