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Motion

What you will learn

  • Motion is a change of position; it can be described in terms of the distance moved or the displacement.

  • The motion of an object could be uniform or non-uniform depending on whether its velocity is constant or changing.

  • The speed of an object is the distance covered per unit time, and velocity is the displacement per unit time.

  • The acceleration of an object is the change in velocity per unit time.

  • Uniform and non-uniform motions of objects can be shown through graphs.

  • The motion of an object moving at uniform acceleration can be described with the help of the following equations, namely
    v = u + at
    s = ut + 1⁄2 at2
    2as = v2 – u2
    where u is initial velocity of the object, which moves with uniform acceleration a for time t, v is its final velocity and s is the distance it travelled in time t.

  • If an object moves in a circular path with uniform speed, its motion is called uniform circular motion.