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Q: By which the kinetic energy of an object increases –
  • A. Friction
  • B. Time
  • C. Mass
  • D. Speed
Correct Answer: Option D - It turns out that an object kinetic energy increases as the square of its speed. When something is in motion, then a type of energy stored in it. This energy is known as kinetic energy.
D. It turns out that an object kinetic energy increases as the square of its speed. When something is in motion, then a type of energy stored in it. This energy is known as kinetic energy.

Explanations:

It turns out that an object kinetic energy increases as the square of its speed. When something is in motion, then a type of energy stored in it. This energy is known as kinetic energy.