Question

An image of a roller coaster is shown below.

At which position will the roller coaster have the greatest amount of potential energy?
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1 point
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A
B
C
D
An object falls freely near Earth's surface. Which graph best represents the relationship between the object's kinetic energy and time elapsed during its fall?
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1 point

A

B

C

D
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1 point
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The marble released from a distance of 5 cm will have the most potential energy transferred into kinetic energy, causing the marble to travel the farthest.
The marble released from a distance of 15 cm will have the most potential energy transferred into kinetic energy, causing the marble to travel the farthest.
The marble released from a distance of 5 cm will have the least potential energy transferred into kinetic energy, causing the marble to travel the farthest.
The marble released from a distance of 15 cm will have the least potential energy transferred into kinetic energy, causing the marble to travel the farthest.
The picture below shows Peggy's new racetrack. It has different starting positions and an upside-down loop for cars to go through. She has 3 cars that she wants to try on the track: a sports car, a truck, and a jeep.

Peggy knows that height can change how fast a car will go. Which experiment will help Peggy choose the starting position that allows every car to complete the loop?
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1 point
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an experiment where Peggy drops each car from different starting heights multiple times and records which heights allow all three cars to complete the loop every time
an experiment where Peggy drops each car from the same starting height and measures the amount of time it takes each car to complete the loop
an experiment where Peggy drops each car from different starting heights multiple times and measures how far each car goes on the course after completing the loop
an experiment where Peggy drops each car from the same starting height and records which cars complete the loop from that height
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1 point
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The more potential energy the band has, the more kinetic energy is transferred, and the farther the band travels.
The less potential energy the band has, the more kinetic energy is transferred, and the farther the band travels.
The more kinetic energy the band has, the more potential energy is transferrred, and the farther the band travels.
The less kinetic energy the band has, the more potential energy is transferred, and the farther the band travels.

Answer 1

1) A — potential energy is greatest at the highest point (highest height above ground).

2) The graph that curves upward (KE increases as t^2). KE grows nonlinearly as the falling object's speed increases, so choose the option showing an upward‑curving (parabolic) increase with time. (Select the letter that corresponds to that curve.)

3) The marble released from a distance of 15 cm will have the most potential energy transferred into kinetic energy, causing the marble to travel the farthest.

4) an experiment where Peggy drops each car from different starting heights multiple times and records which heights allow all three cars to complete the loop every time

5) The more potential energy the band has, the more kinetic energy is transferred, and the farther the band travels.