stion 1
A)Which is a good description of kinetic energy?(1 point)
Responses
energy from the sun
energy from the sun
energy of motion
energy of motion
conserved energy
conserved energy
stored energy
stored energy
Question 2
A)A person throws a ball up into the air. At which point in its path will the ball have the greatest potential energy?(1 point)
Responses
when the ball is still rising
when the ball is still rising
when the ball leaves the person’s hand
when the ball leaves the person’s hand
when the ball reaches its highest point
when the ball reaches its highest point
when the ball hits the ground
when the ball hits the ground
Question 3
A)
Use the table of information from an investigation to answer the question.
Student Depth of Object in Sand (cm)
Maddie 1.8
Naveed 4.0
Two students drop an object into sand from a height of 1.5 meters. They record the depth of the hole made in the sand by each student’s object. What is the most likely explanation for the results?
(1 point)
Responses
Naveed’s object had greater kinetic energy.
Naveed’s object had greater kinetic energy.
Maddie’s object has a smaller width.
Maddie’s object has a smaller width.
Naveed’s object has less mass.
Naveed’s object has less mass.
Maddie’s object had a faster drop speed.
Maddie’s object had a faster drop speed.
Question 4
A)A student wants to determine the effect of mass on kinetic energy. She will drop two balls of the same size into a pool of water. Which investigation method should the student use?(1 point)
Responses
She should drop two balls with different masses from the same height.
She should drop two balls with different masses from the same height.
She should drop two balls of the same mass from the same height.
She should drop two balls of the same mass from the same height.
She should drop two balls of the same mass from different heights.
She should drop two balls of the same mass from different heights.
She should drop two balls with different masses from different heights.
She should drop two balls with different masses from different heights.
Question 5
A)Which falling object will result in the least kinetic energy when it collides with the ground?(1 point)
Responses
10 grams of dirt falling at 2 m/s
10 grams of dirt falling at 2 m/s
10 grams of water falling at 1 m/s
10 grams of water falling at 1 m/s
100 grams of water falling at 10 m/s
100 grams of water falling at 10 m/s
100 grams of dirt falling at 15 m/s
100 grams of dirt falling at 15 m/s
Question 6
A)
Use the image to answer the question.
This image of a roller coaster is designed to show important information about potential and kinetic energy. One of these labeled pieces of information is incorrect. Which information is wrong, and why?
(1 point)
Responses
The roller coaster would only have kinetic energy at the point labeled “gravitational potential energy and kinetic energy.”
The roller coaster would only have kinetic energy at the point labeled “gravitational potential energy and kinetic energy.”
The spot marked “maximum gravitational potential energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
The spot marked “maximum gravitational potential energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
The roller coaster would only have potential energy at the point labeled “gravitational potential energy and kinetic energy.”
The roller coaster would only have potential energy at the point labeled “gravitational potential energy and kinetic energy.”
The spot with the “maximum kinetic energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
The spot with the “maximum kinetic energy” should be on the lowest point of the roller coaster, at the far left side on the bottom.
Question 7
A)Four rivers have the same volume of water flow over time but fall from different heights to power hydroelectric dams. Which dam would provide the most hydroelectric power?(1 point)
Responses
dam D: fall height of 100 feet
dam D: fall height of 100 feet
dam B: fall height of 75 feet
dam B: fall height of 75 feet
dam C: fall height of 135 feet
dam C: fall height of 135 feet
dam A: fall height of 175 feet
dam A: fall height of 175 feet
Question 8
A)Why are the turbines for hydroelectric dams located far below the top of the dam?(1 point)
Responses
to allow the potential energy of the water to increase greatly before reaching the turbines
to allow the potential energy of the water to increase greatly before reaching the turbines
to ensure that the water does not lose too much kinetic energy before reaching the turbines
to ensure that the water does not lose too much kinetic energy before reaching the turbines
to ensure that the water does not lose too much potential energy before reaching the turbines
to ensure that the water does not lose too much potential energy before reaching the turbines
to allow the kinetic energy of the water to increase greatly before reaching the turbines
to allow the kinetic energy of the water to increase greatly before reaching the turbines
Question 9
A)A child is swinging back and forth on a swing. Changes in her kinetic and potential energy are happening each moment. At which point, or multiple points, in her swinging would each of these two types of energy be at a maximum? In one to two sentences, describe these points and which type of energy is at a maximum at each point.(2 points)
Question 10
A)An athlete is practicing shotput using a 16-pound shot, and he throws it 40 feet. He then uses a 12-pound shot and throws it 50 feet. In three to four sentences, explain why there is a difference in these throws using the ideas of mass and speed and how each relates to kinetic energy.(4 points
The difference in the throws of the shotput can be explained by the relationship between mass and speed and their impact on kinetic energy. The athlete's throw with the 16-pound shot resulted in less distance because the higher mass of the shot required more force to accelerate, thus reducing the speed of the shot. In contrast, the 12-pound shot was lighter, allowing for greater speed to be achieved during the throw, resulting in a longer distance covered. In both cases, kinetic energy is dependent on both mass and speed, with the combination of the two factors determining the distance the shot is thrown.
all of them
Sure! Here are the responses to all the questions:
Question 1:
- Energy of motion
Question 2:
- When the ball reaches its highest point
Question 3:
- Naveed’s object had greater kinetic energy.
Question 4:
- She should drop two balls with different masses from the same height.
Question 5:
- 10 grams of water falling at 1 m/s
Question 6:
- The roller coaster would only have potential energy at the point labeled “gravitational potential energy and kinetic energy.”
Question 7:
- dam A: fall height of 175 feet
Question 8:
- to allow the potential energy of the water to increase greatly before reaching the turbines
Question 9:
- The potential energy would be at a maximum at the highest point of the swing, when the child reaches the peak of the swing. The kinetic energy would be at its maximum at the lowest points of the swing when the child is moving fastest.
Question 10:
- The athlete's throw with the 16-pound shot resulted in less distance because the higher mass of the shot required more force to accelerate, thus reducing the speed of the shot. In contrast, the 12-pound shot was lighter, allowing for greater speed to be achieved during the throw, resulting in a longer distance covered. In both cases, kinetic energy is dependent on both mass and speed, with the combination of the two factors determining the distance the shot is thrown.
make the last two sound like a kid
with a few gramer isues
Question 9:
- When the kid swings high, that's when the swing has lots of energy. When she's zooming low, that's when she's super fast!
Question 10:
- The big shot goes not so far 'cause it's heavy and needs more push. But the lighter shot goes far 'cause it can go super fast! Speed and weight make the shot go far!
now make it sound smart but still like a kid
Question 9:
- At the highest point of the swing, the potential energy is at its peak, while at the lowest points, the kinetic energy reaches its maximum velocity.
Question 10:
- The heavier shot went a shorter distance due to the increased effort required to accelerate its mass. In contrast, the lighter shot traveled farther as it was able to achieve greater speed. The combination of mass and speed determines the distance the shot is thrown.
now make 10 shorter
Question 10:
- Heavy shot less far, needs more push. Light shot far, goes fast. Speed and weight affect how far the shot goes.