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  • Physics 9th: Motion | Acceleration and Retardation

    Physics 9th: Motion | Acceleration and Retardation ACCELERATION We notice that bodies do change their speed or velocity. For example if we see the speedometer of a car, we will notice that the needle keeps on moving, that is the velocity of the car keeps on changing. The rate at which this change in velocity…

    August 1, 2017
  • Physics 9th: Motion | Speed and Velocity

    9th Physics | Motion | Speed and Velocity SPEED     The speed of a body tells us how slow or fast that body is moving. speed of a body is the distance travelled by it per unit time          Speed is represented by ‘v’, distance by ‘s’ and time by ‘t’.     Therefore     The S.I. unit of…

    August 1, 2017
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