Newtons First Law Unit 1 Mod. 1 OCR

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  • Newtons First Law
    • Definition
      • A FORCE is NECESSARY to CHANGE the STATE of REST or of UNIFORM MOTION in a STRAIGHT LINE of a body
        • Summarised
          • A force is needed to change uniform motion
    • Motion of Bodies
      • Stationary/ Moving with a constant velocity
        • Net Force = 0
        • Net Force  0< needed to move  body
      • Changing direction of body
        • Changing direction requires force to change velocity
          • To change velocity, acceleration is involved
      • Slowing Down/ Speeding Up
        • Need NET force in either direction, or opposing direction of motion. Causing Acceleration.
          • REMEMBER: Acceleration can be positive and negative as can any VECTOR QUANTITY
            • Vector quantities have BOTH SIZE and DIRECTION
    • Key Terms
      • Net/ Resultant (Force)
        • Sum of the (Force) VECTORS
    • Remember!
      • There are only 3 TYPES of forces OUTSIDE of the NUCLEUS of an ATOM
        • Gravitational
        • Electrical
        • Magnetic

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