Potential Energy of a System Quick Check
Science 8 Q1 / Energy of Motion
Use the picture to answer the question.
The girl in the picture is at the highest point in swinging and starts to come down. Which statement best describes the changes in energy as she begins to descend?
(1 point)
Responses
Kinetic energy is increasing, and potential energy is decreasing.
Kinetic and potential energy are decreasing.
Kinetic and potential energy are increasing.
Potential energy is increasing, and kinetic energy is decreasing.
A person is riding a skateboard on a U-shaped ramp. At which point does the person have the greatest potential energy?(1 point)
Responses
in the middle of the ramp at its lowest point in the U
on the other side of the ramp as the person is coming back up
at the top of the ramp before they begin moving down into the ramp
on the first part of the ramp as the person is moving down the side
Use the picture to answer the question.
As the bicyclist rides from right to left, at which of the three points, if any, is the bicyclist’s potential energy increasing?
(1 point)
Responses
The potential energy is increasing at point A because the bicyclist is moving fastest at that point.
The potential energy is always decreasing because the bicyclist continues to move forward.
The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
The potential energy is increasing at point B because the bicyclist is highest there.
If a monkey drops a banana off of a cliff, where are the potential and kinetic energies of the banana equal.(1 point)
Responses
a quarter of the way down
at the bottom
half way down
at the top
what is the answer to all for 4 questions
The answers for the four questions are as follows:
1. The girl's potential energy is decreasing, and her kinetic energy is increasing.
2. The person has the greatest potential energy at the top of the ramp before they begin moving down into the ramp.
3. The potential energy of the bicyclist is increasing at point C because the bicyclist is increasing in elevation at that point.
4. The potential and kinetic energies of the banana are equal at the bottom of the cliff.
tell what the correct answer is to all 4 questions please
1. The correct answer is: Kinetic energy is increasing, and potential energy is decreasing.
2. The correct answer is: at the top of the ramp before they begin moving down into the ramp.
3. The correct answer is: The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
4. The correct answer is: at the bottom.
1. The girl in the picture is at the highest point in swinging and starts to come down. The statement that best describes the changes in energy as she begins to descend is: Kinetic energy is increasing, and potential energy is decreasing.
2. In the case of a person riding a skateboard on a U-shaped ramp, the point where the person has the greatest potential energy is at the top of the ramp before they begin moving down into the ramp.
3. As the bicyclist rides from right to left in the picture, the point at which the bicyclist's potential energy is increasing is point C because the bicyclist is increasing in elevation at that point.
4. If a monkey drops a banana off of a cliff, the point at which the potential and kinetic energies of the banana are equal is at the bottom.
The answers to the four questions are as follows:
1. Kinetic energy is increasing, and potential energy is decreasing.
2. At the top of the ramp before they begin moving down into the ramp.
3. The potential energy is increasing at point C because the bicyclist is increasing in elevation at that point.
4. At the bottom.
To answer these questions, we need to understand the concepts of potential energy and kinetic energy. Potential energy is the energy possessed by an object due to its position or condition. Kinetic energy is the energy possessed by an object due to its motion.
For the first question:
The girl in the picture is at the highest point in swinging and starts to come down. Since she is moving from a higher point to a lower point, her potential energy is decreasing. At the same time, as she starts to come down, her motion increases, which means her kinetic energy is increasing. So, the correct statement is: Kinetic energy is increasing, and potential energy is decreasing.
For the second question:
The person riding a skateboard on a U-shaped ramp will have the greatest potential energy at the top of the ramp before they begin moving down into the ramp. This is because potential energy depends on the height or elevation, and the highest point in the ramp is where the person will have the greatest potential energy.
For the third question:
As the bicyclist rides from right to left in the picture, there are three points: A, B, and C. At point A, the potential energy is increasing because the bicyclist is moving the fastest at that point. At point B, the potential energy is highest because the bicyclist is at the highest elevation. At point C, the potential energy is increasing because the bicyclist is increasing in elevation. So, the correct answer is: The potential energy is increasing at point A because the bicyclist is moving fastest at that point.
For the fourth question:
When a monkey drops a banana off a cliff, the potential and kinetic energies of the banana will be equal at the halfway point down. This is because as the banana falls, its potential energy decreases while its kinetic energy increases. At the halfway point, the potential energy reaches its minimum, and the kinetic energy is at its maximum, resulting in both energies being equal. So, the correct answer is: halfway down.