1. The kinetic energy (KE) of the object at a given instant when its velocity is v is expressed as 1/2mv², where m is the mass of the object and v is its velocity.

    The kinetic energy (KE) of the object at a given instant when its velocity is
    v is expressed as 1/2mv², where m is the mass of the object and v is its velocity.

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  2. At height ℎ, the total energy of the object is the sum of its potential and kinetic energies. Since the object is initially at rest, its total energy is purely potential, given by mgh, where m is mass and g is gravity.

    At height ℎ, the total energy of the object is the sum of its potential and kinetic energies. Since the object is initially at rest, its total energy is purely potential, given by mgh, where m is mass and g is gravity.

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