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Work, Energy, Power and Collision — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsWork, Energy, Power and Collision1 Mark
MCQ
Which of the following statements is true
  • A
    In elastic collisions, the momentum is conserved but not in inelastic collisions
  • B
    Both kinetic energy and momentum are conserved in elastic as well as inelastic collisions
  • ✓
    Total kinetic energy is not conserved but momentum is conserved in inelastic collisions
  • D
    Total kinetic energy is conserved in elastic collisions but momentum is not conserved in elastic collisions A tennis ball dropped from a height of $2 \mathrm{~m}$ rebounds only $1.5 \mathrm{~m}$ after hitting the ground. What fraction of its energy is lost in the impact
✓

Answer

Correct option: C.
Total kinetic energy is not conserved but momentum is conserved in inelastic collisions
(c)

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