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Universal Forces

Universal Forces. 12.4 Notes. define electromagnetic force. A combo of electric and magnetic force that is associated with charged particles. Electric force and magnetic force are the only forces that can attract and repel. What are electric forces?.

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Universal Forces

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  1. Universal Forces 12.4 Notes

  2. define electromagnetic force • A combo of electric and magnetic force that is associated with charged particles. • Electric force and magnetic force are the only forces that can attract and repel.

  3. What are electric forces? • Forces that act between charged objects or particles (electrons and protons). • Opposite charges attract and like charges repel.

  4. What are magnetic forces? • Forces that act on • certain metals, • poles of magnets and • on moving charges.

  5. What type of force acts between particles of the same electrical charge? • Electric force

  6. What are the two forces that hold a positively charged proton nucleus together? • Strong nuclear force and weak nuclear force

  7. explain strong nuclear force • A powerful force of attraction that acts only on protons and neutrons holding them together

  8. What is the range over which strong nuclear force acts? • Approximately equal to the diameter of a proton

  9. How strong is strong nuclear force? • 100 times stronger that the electric force of repulsion at these distances

  10. explain weak nuclear force • It is another powerful nuclear force yet it is weaker than strong nuclear force and acts over a shorter range.

  11. What is gravitational force? • An attractive force between any two masses.

  12. Newton’s law of universal gravitation • Every object in the universe attracts every other object.

  13. What factors affect gravitational force? • Mass and distance

  14. describe centripetal force as it relates to our moon’s orbit • Centripetal force is a center-directed force that continuously changes the direction of an object to make it move in a circle. • The center-directed force of Earth’s gravity pulls the moon into a nearly circular orbit around Earth.

  15. explain the tide cycle • The gravitational pull from the moon produces 2 bulges in our oceans. • One bulge is on the side closest to the moon, • the other bulge is on the side farthest from the moon. • The Earth rotates once per day beneath these 2 bulges which results in high and low tides.

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