A woman runs as shown.
What main energy conversion occurs?
(1 point)
Responses
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
Mechanical energy changes into chemical energy as the kinetic energy from motion creates reactions in the surrounding air.
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 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.
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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 that chemical energy changes into mechanical energy. This is because the energy from the digestion of food provides energy for the runner's motion.
The main energy conversion that occurs when a woman runs is that chemical energy changes into mechanical energy. This is because the energy from the digestion of food provides the energy for the runner's motion. To determine this answer, we need to understand the basic concept of energy and how it is converted from one form to another.
Energy is the ability to do work or cause change. There are different forms of energy, such as mechanical energy (associated with motion and position), thermal energy (associated with heat), and chemical energy (associated with the energy stored in the bonds of molecules).
In the case of a runner, the initial energy for the motion comes from the chemical energy stored in the food she has consumed. Through the process of digestion and metabolism, the body converts the chemical energy from the food into a form that can be used for the runner's motion - mechanical energy. This mechanical energy is then used to propel the runner forward.
To determine the answer, we can rule out the options involving thermal energy, as there is no mention of heat being used as energy for motion. We can also rule out the option involving mechanical energy changing into chemical energy, as this would imply the runner is generating chemical reactions in the air around her, which is not the main energy conversion happening.
Therefore, the correct answer is: Chemical energy changes into mechanical energy because energy from digestion of food provides energy for the runner’s motion.