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Forces, Gravity, FORCES, Extension: There are more non contact forces than…

- - - - The bigger the sun is the more effect of pull it has on the planet
  - - - The greater the mass the more attraction it has to smaller objects in mass.
- - - - An electrostatic force is when an object (eg a plastic comb) has more positive charge than negative (for example after being rubbed on dry hair), allowing it to exert a force on an object (e.g. paper) and attract it. This is called static electricity. When an object is equal in positive charge and negative charge it is called electrically neutral.
    - - Lightning is a powerful example of static electricity.
        
        There are two types of electricity: Positive and Negative.
        
        When an object is equal in positive charge and negative charge it is called electrically neutral.
    - - Example #1
        
        Rubbing a balloon onto hair. The hair will try to stick to the balloon. This is one form of static electricity.
      - Example #2
        
        Rubbing a plastic comb to dry hair will create an electric charge also called static electricity. (like example #1)
    - - Why do balloons stick to hair when rubbed?
        
        When two objects are rubbed together it creates an electrical charge called static electricity. If the objects have opposite charges, so, positive or negative, then they will stick together. Some objects have more charge than others. This depends on how strained the material of one object is. Stretchering a material gave it tiny holes. by rubbing (applying friction) to a "stretched" object lets an electrical charge to transport, creating static electricity.
  - - - b
        
        c
        
        d
        
        An example of magnetism is a bar magnet, which is attracted to a magnetic field and can attract or repel other magnets.
        
        (from: A Simple Introduction to Magnetism. Available at: https://www.thoughtco.com/magnetism-definition-examples-4172452#:~:text=The%20most%20familiar%20example%20of,attract%20or%20repel%20other%20magnets.)
        
        All magnets have a North pole and a South pole
        
        magnetic force flows from the North to the South
        
        If you have two magnets and try to force the South side to the other magnets South side or the North side to the other magnets North side then they will repel each other, but if a North side and a South side are put together then they will attract each other.
      - Magnetism is a force that comes from magnets, magnets are a stone or metal that attracts most metals. The main metals that are attracted to magnets are items high in iron, cobalt and/or nickel, not all objects are attracted to magnets. iron, cobalt and nickel are called ferromagnetic.
      - There are 3 types of magnets. Temporary magnets, permanent magnets and electromagnets.
- - - - Our solar system is rotating around the sun in orbit. This is the cause of gravity.
- - - - b.
        
        c. Example:
        squishing Plasticine down so it's flattened.
        
        d.
        
        e. Questions: (red = observation/summary)
        
        You hit a ball with a bat. What factors will influence how far the ball will go?
        
        What Mechanical Systems use a push force?
        
        2 more items...
        
        1. How hard you hit the ball (push on the ball) 2. How heavy the ball is (gravity effect on the mass you're trying to move) 3. Gravity 4. Air Resistance
        
        Any kind of force is really just a push or a pull.
        
        A magnet might pull an object toward it or push it away.
  - - - Example:
        Rubbing two hands together to make heat.
  - - - example: trying to push a balloon underwater in a bucket filled with water.
  - - - Example:
        Holding to ends of a thin pieces of putty and rotating them in opposite directions.
        
        Facts and Attributes: Some things that are involved with a twisting force is how hard you twist something, what that something is and how hard or easy it is to twist.
        
        Questions:
        
        1. Can you convert a push force into a twist force?
        
        a way to convert a push force into a twist force is pushing the top of a wheel to make it go around
        
        2. What mechanical systems use a twist force?
        
        Axel on a car
        
        3. A twist force is not technically a force. Why is that the case?
        
        1 more item...
  - - - Example: Tug of War Game between two sides, where one side is stronger than the other so the weaker will be pulled toward the stronger.
        
        Facts and Attributes: If the pull force is balanced, the object wont move. If it is unbalanced it will move toward the stronger pull. Once an object is started in motion with a pull, it may continue depending on the amount of force, the mass of the object and the amount of gravity.
        
        Questions
        
        Can you convert a push force into a pull force?
        
        With a pulley you could push on a rope, it turns on the pulley and the rope pulls an object toward the person.
        
        This pulley would be stationed on a wall horizontally.
        
        Can a pull force ever be a non contact force? If so, when?
        
        Yes, for example with a north pole of a magnet being pulled toward a south pole of a stronger magnet
        
        1 more item...
        
        What mechanical systems use a pull force?
        
        1 more item...