Question

After Pedro had breakfast, he went for a run. Identify at least three energy transformations that had to take place to allow Pedro to complete his run. Then use evidence to support the claim that energy in this system was conserved as it was transformed.

Answer 1

Answer:

1) Chemical to mechanical (calories -> muscle contractions)

2) mechanical to mechanical (muscle -> motion)

3) mechanical to thermal (motion -> heat from the body causes sweating)

The potential energy is stored in the body chemically (via food). That potential energy is then released when the body is put in motion.

Explanation:

Answer 2

The energy transformation that takes place are:

• Chemical energy to Mechanical energy
• Potential energy to Kinetic energy
• Chemical energy to Thermal energy.

When an individual consume food, the body often at times uses the chemical energy in the food to make the muscles contracts so that an individual can breathe, walk, run and do other things.

• The chemical energy often in the food gets converted into the mechanical energy of moving muscle.

The chemical energy in food can also be changed to another kind of chemical energy when it is stored as glucose or fat.

It can also be changed to thermal energy due to the fact that our body produces heat when we are digesting our food.

When an individual is running, the body often convert potential energy into kinetic energy.

Potential energy is often used when the system uses kinetic energy to move in a horizontal direction.

Potential energy is often stored in the form of chemical energy in the body.

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