A woman runs as shown.
What main energy conversion occurs?
(1 point)
Responses
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Mechanical energy changes into thermal energy because the energy from motion creates heat in the air around the runner.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
Thermal energy changes into mechanical energy because heat provides energy for motion.
Thermal energy changes into mechanical energy because heat provides energy for motion.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.
The correct answer is: Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner's motion.
The main energy conversion that occurs when a woman runs is the conversion of chemical energy into mechanical energy because energy from the digestion of food provides energy for the runner's motion.
To arrive at this answer, we can analyze the process of running. When a person runs, their muscles contract, move their limbs, and propel their body forward. This movement requires energy. In the human body, the primary source of energy is chemical energy stored in the form of food.
During digestion, carbohydrates, fats, and proteins from food are broken down into simpler molecules like glucose. These molecules then enter the bloodstream and are transported to muscle cells. Inside the muscle cells, glucose molecules undergo a series of chemical reactions called cellular respiration, which involves a combination of aerobic and anaerobic processes.
During cellular respiration, glucose molecules react with oxygen to produce adenosine triphosphate (ATP), which is a molecule that stores and releases energy. This ATP provides the energy needed for muscle contractions during running.
Therefore, the main energy conversion when a woman runs is the conversion of chemical energy from the digestion of food into mechanical energy to power the motion of the runner.