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Unformatted text preview: Example 5.24) A passenger on a carnival Ferris wheel moves in a vertical circle of radius R with constant speed. The seat remains upright during the motion. Find expressions for the force the seat exerts on the passenger at the top and the bottom. Chapter 6 : Work and Kinetic Energy 1. Work Work The product of displacement and the force in the direction of displacement Unit : J (joule)=N m scalar quantity cos W F s Fs φ = = r r Constant Force, Straight line displacement Example 6.1) ˆˆ (160 ) (40 ) F N i N j = r ˆˆ (14 ) (11 ) s m i m j = + r How much work is done? Positive work, Negative work, Zero work Example 6.2) Work done by several forces Work done on an object can change its motion and energy. 2. Kinetic Energy and WorkEnergy Theorem Kinetic energy : Energy of motion Workenergy theorem Work done by the net force on a particle equals the change in the particle’s kinetic energy 2 1 2 K mv = Definition of kinetic energy 2 1 tot W K K K = = ∆...
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This note was uploaded on 02/13/2012 for the course RANDOM 100 taught by Professor Idk during the Fall '08 term at Virginia Tech.
 Fall '08
 idk

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