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Helga [31]
3 years ago
8

Which has more kinetic energy, a 40 kg cheetah running at 25 m/s or a 4,000 kg elephant moving at 2 m/s? How much more energy do

es it have?
Physics
1 answer:
denis23 [38]3 years ago
8 0

Answer:

1st case; mass=40 kg

      v=25m/s

K.E.=1/2[40][25]^2=12,500 J

2nd case; mass=4,000 kg

       v=2 m/s

  K.E.=1/2[4000][2]^2=8000J

in case 1 Kinetic energy is greater.

Explanation:

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As the roller coaster speeds up on the way down the hill, the potential energy of  roller coaster will be converted to kinetic energy.

<h3>What is Conservation of Energy ?</h3>

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Given that at the top of a hill a roller coaster has gravitational potential energy due to its position. What will happen to this potential energy as the roller coaster speeds up on the way down the hill is that the potential energy to the roller coaster will start decreasing while the kinetic energy will start to increase.

The total energy of the roller coaster will be constant because of conservation of energy. As the roller coaster speeds up on the way down the hill, the potential energy will eventually reduce to zero where the total energy of the as the roller coaster will be equal to maximum kinetic energy.

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