explain how motion under gravity takes place . explain for these cases how the equation of motion changes for both upward and downward direction ?
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If gravity is the only force acting on an object, the sum of kinetic energy and gravitational energy is constant. Increases in kinetic energy are balanced by decreases in gravitational energy, and vice versa.
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A motion under gravity refers to the movement of an object whose vertical motion is affected by the presence of gravity. WEIGHT = MASS multiplied by GRAVITY. Mathematically speaking if weight=W, mass=m, and gravity=g then: W=mg.
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