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Fundamental forces
- 1. Fundamental Forces of theUniverse
- 2. There are fourfundamental forces, or interactions in nature. • Strong nuclearStrong nuclear • ElectromagneticElectromagnetic • Weak nuclearWeak nuclear • GravitationalGravitational Strongest Weakest
- 3. Title your page: TheFour 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 • Causeselectric 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 • Weakestof 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 isweak 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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