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A body has a free fall from a height of 20 m . After falling through a distance of 5 m , the body would

Options

  1. Alose one-fourth of its total energy
  2. Blose one-fourth of its potential energy
  3. Cgain one-fourth of its potential energy
  4. Dgain three-fourth of its total energy

Correct answer

B. lose one-fourth of its potential energy

Step-by-step solution

According to law of conservation of energy total energy remains conserved. P.E. = mgh =20 mg Loss in potential energy is observed, as aligned & ( P.E. )^1= mgh =5 mg & ( P.E )^1 /( P.E )=5 mg / 20 mg =1 / 4 & ( P.E. )^1=1 / 4 P.E aligned

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