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Physics Mechanics - Forces, Work, Energy and Motion

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A particle is thrown vertically up from the earth with a velocity of 9.8 m/s. At what height will its kinetic energy be reduced to 3/4 of its original kinetic energy?

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1.225 m

💡 Explanation:

Loss in kinetic energy of the particle = Gain in potential energy of the particle

(1/4) * (1/2) * m* v*v = m * g * h

( 1/8) * m * 9.8 * 9.8 = m * 9.8 * h

h = (1/8) * 9.8 h = 1.225 m

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