 Ch 1. Particle General Motion Multimedia Engineering Dynamics Position,Vel & Accel. Accel. varyw/ Time Accel. Constant Rect. Coordinates Norm/Tang. Coordinates Polar Coordinates RelativeMotion
 Chapter - Particle - 1. General Motion 2. Force & Accel. 3. Energy 4. Momentum - Rigid Body - 5. General Motion 6. Force & Accel. 7. Energy 8. Momentum 9. 3-D Motion 10. Vibrations Appendix Basic Math Units Basic Equations Sections Search eBooks Dynamics Fluids Math Mechanics Statics Thermodynamics Author(s): Kurt Gramoll ©Kurt Gramoll DYNAMICS - EXAMPLE Disc Launching Example A spring loaded machine is able to launch a 2 kg disc 50 meters vertically into the air before it begins to descend. What was the initial velocity? Solution Velocity will be zero at top Since both the initial velocity and time is unknown, the equation without time should be used,      v2 = vo2 + 2ac(y - yo) Substituting the known values give,      0 = vo2 + 2(-9.81 m/s2)(50 m)      vo = 31.32 m/s

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