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physical quantity - Coggle Diagram

- - - - PYTHAGORAS' THEOREM (hyp)² = (adj)² + (opp)²
        
        steps:
        
        draw a vector diagram
        
        Calculate the magnitude of the resultant vector, using Pythagoras' Theorem.
        
        Calculate the direction of the resultant vector using trigonometry.
        
        State the final answer completes with direction.
    - - steps:
        
        Choose a scale which fits the page For example, use 1 cm = 10 m or 1 cm = 1 N, so that the diagram is around 10cm
        
        Draw the vectors at right angles to one another.
        
        Complete the rectangle.
        
        Draw the resultant vector diagonally from the origin.
        
        Carefully measure the length of the resultant vector.
        
        Use the scale factor to calculate the magnitude.
        
        Use the protractor to measure the angle.
        
        example:
- - - - gravitational field strength
        
        the force per unit mass acting on an objectin a gravitational field on earth
        
        this is equal to 9.8N/Kg
  - - - objects will always fall to the ground
      - objects stay firmly on the ground
      - satellites are kept in orbit
  - - - mass is found by using a scale
      - volume can be found by calculating with the appropriate equation if the shape is regular, or using a measuring cylinder ed with water for irregular objects
        
        volume of a cube: L x W x H
        
        volume of a cylinder: πr² x H
        
        vomule of sphere: 4/3πr³