An Olympic high jumper starts running. As she approaches the bar, she pushes off the
ground and lifts her body off the ground and flies over the bar. She then falls down into a large padding on the ground. Describe the energy transformation:
The _________ energy in food that she had eaten is transformed into _______
energy of her moving body.
The ____________ energy of her moving body is transformed into mostly
__________ energy and some _____________ energy as she passes over the bar.
The ___________ energy and ____________ energy is transformed into
_______________ energy as she falls.
When she hits the padding, her ___________ energy is transformed into ________
energy by the padding.
The chemical energy in food that she had eaten is transformed into kinetic energy of her moving body.
The kinetic energy of her moving body is transformed into mostly potential energy and some kinetic energy as she passes over the bar.
The potential energy and kinetic energy is transformed into gravitational potential energy as she falls.
When she hits the padding, her kinetic energy is transformed into mechanical energy by the padding.
The energy transformation can be described as follows:
1. The chemical potential energy in food that she had eaten is transformed into kinetic energy of her moving body.
- To get this answer, we need to understand that high jumpers need energy to perform physical activities. This energy is obtained through the consumption of food, which contains chemical potential energy. When the high jumper eats the food, the body breaks down the chemical bonds in the food during digestion, converting it into a form that the body can use as energy.
2. The kinetic energy of her moving body is transformed into mostly gravitational potential energy and some kinetic energy as she passes over the bar.
- To understand this, we can break down the different forms of energy involved in the high jump. As the high jumper approaches the bar, she is in motion, which is kinetic energy. As she pushes off the ground and lifts her body over the bar, her kinetic energy is transformed into gravitational potential energy as she reaches maximum height in her jump. However, she still retains some kinetic energy as she continues moving forward in the air.
3. The gravitational potential energy and kinetic energy is transformed into mechanical energy as she falls.
- After clearing the bar, the high jumper starts descending towards the ground due to the force of gravity. As she falls, her gravitational potential energy is gradually converted back into kinetic energy. At this point, the energy is in the form of mechanical energy, which is the sum of both gravitational potential energy and kinetic energy.
4. When she hits the padding, her kinetic energy is transformed into heat energy by the padding.
- As the high jumper lands on the padding, the remaining kinetic energy in her body is absorbed by the padding. This energy is transformed into heat energy through the process of friction and compression between the high jumper and the padding material.
Overall, the energy transformation in the given scenario involves the conversion of chemical potential energy into kinetic energy, followed by the transformation of kinetic energy into gravitational potential energy and mechanical energy, and finally converting the remaining kinetic energy into heat energy.