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Effects of force, motion

Effects of force, motion. Kamil Sarka. Fundamental forces. Contact (friction, centripetal…) Electric magnetic. Drag and friction. Friction is the rubbing between solid objects.

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Effects of force, motion

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  1. Effects of force, motion Kamil Sarka

  2. Fundamental forces • Contact (friction, centripetal…) • Electric • magnetic

  3. Drag and friction • Friction is the rubbing between solid objects. For instance, when you rub your hands together you will feel friction, the force that resists motion and creates heat. • Drag is the friction between a solid object and a liquid or a gas. For instance, when you sail a boat across a lake, the force that resists the movement of the boat through the water is drag. • Heat is generated by drag just as heat is generated by friction. http://www.roymech.co.uk/Useful_Tables/Tribology/co_of_frict.htm

  4. Normal (perpendicular) force Friction force Coefficient of static friction Drag and friction http://jersey.uoregon.edu/vlab/friction/Friction_plugin.html

  5. Rolling friction Coulomb friction > rolling friction http://webphysics.davidson.edu/faculty/dmb/PY430/Friction/rolling.html

  6. Undamped spring

  7. Undamped spring

  8. Damped oscillator

  9. Fictitious force is an apparent force that acts on all masses in a non-inertial frame An additional force due to nonuniform relative motion of two reference frames is called a pseudo-force.

  10. Angular motion angular velocity period = the time of running one circle frequency = number of circles per second angular acceleration

  11. Linear Velocity v [m.s-1] Acceleration a [m.s-2] Angular Angular velocity  [s-1] Angular acceleration  [s-2] and Note that Linear vs. angular quantities

  12. Centripetal force http://regentsprep.org/Regents/physics/phys06/bcentrif/default.htm

  13. Thank you.

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