A person throws a ball up into the air. At which point in its path will the ball have the greatest potential energy?
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1 point
When the ball is still rising
When the ball reaches its highest point
When the ball leaves the person’s hand
When the ball hits the ground
When the ball reaches its highest point.
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 pieces of information is incorrect. Which information is wrong, and why?
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1 point
The roller coaster would only have kinetic 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 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 highest point of the roller coaster, not the lowest point, at the far right side on the top. This is because at the highest point, the coaster has the greatest potential energy, which is converted to kinetic energy as the coaster moves down the track.
Use the table of information from an investigation to answer the question.
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?
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1 point
Maddie’s object has a smaller width.
Naveed’s object has less mass.
Naveed’s object had greater kinetic energy.
Naveed’s object had greater kinetic energy.
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?
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1 point
She should drop two balls with different masses from different heights.
She should drop two balls with different masses from the same height.
She should drop two balls of the same mass from different heights.
She should drop two balls of the same size from the same height.
Which statement explains how the charges on objects determine the electric force between them?
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1 point
Objects with positive charges attract each other, and objects with negative charges repel each other.
Objects with the same charge attract each other, and objects with opposite charges repel each other.
Objects with positive charges repel each other, and objects with negative charges attract each other.
Objects with the same charge repel each other, and objects with opposite charges attract each other.
Objects with the same charge repel each other, and objects with opposite charges attract each other.
To determine at which point in its path the ball will have the greatest potential energy, we need to understand the concept of potential energy and how it changes during the ball's motion.
Potential energy is the stored energy that an object possesses due to its position or condition. In the case of the ball, its potential energy is directly related to its height above a reference point, like the ground.
When the ball is at its highest point in its path, it has reached its maximum height. At this point, the ball is momentarily motionless before gravity pulls it back down. Since potential energy is directly proportional to height, the ball will have the greatest potential energy when it reaches its highest point.
Therefore, the correct answer is: When the ball reaches its highest point.
To get this answer, we need to understand the physics of projectile motion and use the concept of potential energy. By analyzing the ball's trajectory and recognizing that potential energy is greatest at maximum height, we can determine the correct answer.