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EXERCISES AND  PROBLEMS FORCE AND MOTION ssm Solution is in the Student Solutions Manual. www Solution is available on the World Wide Web at: http://www.wiiey.comlcollege/hrw Ilw Solution is available on the Interactive Learning Ware. Properties of Friction , IE. A bedroom bureau with a mass of 45 kg, including drawers and clothing, rests on the floor. […]

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REVIEW AND SUMMARY FORCE AND MOTION 11 Friction When a force F tends to slide a body along a surface, a frictional force from the surface acts on the body. The frictional force is parallel to the surface and directed so as to oppose the sliding. It is due to bonding between the body and the surface. Three Properties […]

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Sample Problem Force And Motion 11 Represents a stock car of mass m =J 600 kg traveling at a constant speed  around a flat, circular track of radius. SOLUTION: We need to relate , to the circular motion of the car. We start with four Key Ideas, all related to one force on the car. 1. A […]

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Sample Problem Force And Motion 11 Even some seasoned roller-coaster riders blanch at the thought of riding the Rotor, which is essentially a large, hollow cylinder that is rotated rapidly around its central axis ). Before the ride begins, a rider enters the cylinder through a door on the side and stands on a floor, up against a canvas-covered […]

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Sample Problem Force And Motion 11 In a 1901 circus performance, All Dare Devil Dialog introduced the stunt of riding a bicycle in a loop-the-loop . As sum in that the loop is a circle with radius . SOLUTION: A Key Idea in analyzing Diavolo’ s stunt is to assume that he and his bicycle travel through the […]

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Sample Problem Force And Motion 11 Igor is a cosmonaut-engineer on the International Space Station, in a circular orbit around Earth, at an altitude h of 520 km and with a constant speed v of 7.6 km/s. Igor’s mass m is 79 kg. SOLUTION: The Key Idea here is that Igor is in uniform circular motion and thus […]

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Uniform Circular Motion From Section recall that when a body moves in a circle (or a circular arc) at constant speed v, it is said to be in uniform circular motion. Rounding a curve in a car. You are sitting in the center of the rear seat of a car moving at a constant high speed […]

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Sample Problem Force And MOTION 11 A raindrop with radius R = 1.5 mm falls from a cloud that is at height h = 1200 m above the ground. The drag coefficient C for  the drop is 0.60. SOLUTION: The Key Idea here is that the drop reaches a terminal speed v, when the gravitational force on […]

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Sample Problem Force And Motion 11 If a falling cat reaches a first terminal speed of 97 km/h while it is tucked in and then stretches out, doubling A. SOLUTION: The Key Idea here is that the terminal speeds of the cat depend on (among other things) the effective cross-sectional areas A of the cat, according.

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The Drag Force And Terminal Speed A fluid is anything that can flow-generally either a gas or a liquid. When there is a relative velocity between a body (either because the body moves through the fluid or because the fluid moves past the body), the body experiences a drag  force that opposes the relative motion and points […]