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Fundamental forces

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There are four fundamental forces in nature: the strong nuclear force, electromagnetic force, weak nuclear force, and gravitational force. The strong nuclear force binds protons and neutrons together in the nucleus of an atom. The electromagnetic force is responsible for electric and magnetic effects and acts over longer distances than the strong force. The weak nuclear force causes nuclear decay and has an extremely short range. Gravity is the weakest force but acts over the greatest distances and is responsible for attraction between all objects with mass.

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Fundamental Forces of the Universe
There are four fundamental forces, or interactions in nature. • Strong nuclearStrong nuclear • ElectromagneticElectromagnetic • Weak nuclearWeak nuclear • GravitationalGravitational Strongest Weakest
Title your page: The Four Fundamental Forces of Physics Force Particles or Forms of Matter involved Definition of the force Strong Nuclear Electromagnetic Weak Nuclear Gravitational
Strong nuclear force • Holds the nuclei (protons and neutrons) ofHolds the nuclei (protons and neutrons) of atoms togetheratoms together (Think about it – those protons want to repel(Think about it – those protons want to repel because they are positive charges, but thebecause they are positive charges, but the strong force holds them together)strong force holds them together) • Very strong, but only over very, very, veryVery strong, but only over very, very, very short distances (within the nucleus of theshort distances (within the nucleus of the atom)atom)
Electromagnetic force • Causes electric and magnetic effectsCauses electric and magnetic effects • Electrons repel each otherElectrons repel each other • Opposite charges attract each otherOpposite charges attract each other • Interactions between magnetsInteractions between magnets • Weaker than the strong nuclear forceWeaker than the strong nuclear force • Acts over a much longer distance range than theActs over a much longer distance range than the strong nuclear forcestrong nuclear force
Weak nuclear force • Responsible for nuclear decayResponsible for nuclear decay • The force that causes the protons to repelThe force that causes the protons to repel from each other.from each other. • Weak and has a very short distance rangeWeak and has a very short distance range
Gravitational force • Weakest of all fundamental forces, but actsWeakest of all fundamental forces, but acts over very long distancesover very long distances • The attraction between any objects with mass.The attraction between any objects with mass. • Gravity increases when mass increases andGravity increases when mass increases and objects are closer together.objects are closer together.
Summary • Why is weak nuclear force is NOT the weakest of theWhy is weak nuclear force is NOT the weakest of the fundamental forces?fundamental forces?
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Fundamental forces

  • 2. There are four fundamental forces, or interactions in nature. • Strong nuclearStrong nuclear • ElectromagneticElectromagnetic • Weak nuclearWeak nuclear • GravitationalGravitational Strongest Weakest
  • 3. Title your page: The Four Fundamental Forces of Physics Force Particles or Forms of Matter involved Definition of the force Strong Nuclear Electromagnetic Weak Nuclear Gravitational
  • 4. Strong nuclear force • Holds the nuclei (protons and neutrons) ofHolds the nuclei (protons and neutrons) of atoms togetheratoms together (Think about it – those protons want to repel(Think about it – those protons want to repel because they are positive charges, but thebecause they are positive charges, but the strong force holds them together)strong force holds them together) • Very strong, but only over very, very, veryVery strong, but only over very, very, very short distances (within the nucleus of theshort distances (within the nucleus of the atom)atom)
  • 5. Electromagnetic force • Causes electric and magnetic effectsCauses electric and magnetic effects • Electrons repel each otherElectrons repel each other • Opposite charges attract each otherOpposite charges attract each other • Interactions between magnetsInteractions between magnets • Weaker than the strong nuclear forceWeaker than the strong nuclear force • Acts over a much longer distance range than theActs over a much longer distance range than the strong nuclear forcestrong nuclear force
  • 6. Weak nuclear force • Responsible for nuclear decayResponsible for nuclear decay • The force that causes the protons to repelThe force that causes the protons to repel from each other.from each other. • Weak and has a very short distance rangeWeak and has a very short distance range
  • 7. Gravitational force • Weakest of all fundamental forces, but actsWeakest of all fundamental forces, but acts over very long distancesover very long distances • The attraction between any objects with mass.The attraction between any objects with mass. • Gravity increases when mass increases andGravity increases when mass increases and objects are closer together.objects are closer together.
  • 8. Summary • Why is weak nuclear force is NOT the weakest of theWhy is weak nuclear force is NOT the weakest of the fundamental forces?fundamental forces?