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anonymous

  • one year ago

The kinetic energy (KE) of a ball the moment it hits the ground when dropped from a height above the ground is exactly equal to the potential energy (PE) of the ball when it was released. Which is true about this closed physical system? a. It obeys the second law of thermodynamics. b. It obeys the first law of thermodynamics. c. It obeys the law of conservation of energy.

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  1. Michele_Laino
    • one year ago
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    Hint: If we have the equation: KE=PE, then energy is conserved, since we have this situation: |dw:1432943992297:dw| so the sum: KE + PE = mgh, at both positions

  2. shamim
    • one year ago
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    Anyway thermodynamics deals with heat

  3. shamim
    • one year ago
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    Total energy is always equal is called conservation of energy

  4. shamim
    • one year ago
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    Total energy=k.E+p.E

  5. anonymous
    • one year ago
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    thanks for the help!!

  6. shamim
    • one year ago
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    Welcome!!

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