In the diagram below, two objects of the same size and mass are released from rest at the starting position. Object 1 was released before Object 2 was released. The diagram below shows the positions of Objects 1 and 2 a short time after both were released.
Which object in the figure has the least amount of kinetic energy?
(1 point)
Responses
A. Object 1
B. Object 2
C. Both objects have the same amount of kinetic energy.
D. Neither object has any kinetic energy.
The object with the least amount of kinetic energy is Object 2.
If you are at an amusement park and you ride a slingshot, how does your potential energy compare to your kinetic energy at the top of the shot?
(1 point)
Responses
A. The kinetic energy and potential energy are the same.
B. The kinetic energy is less than potential energy.
C. The kinetic energy is twice the amount of potential energy.
D. Kinetic energy is greater than potential energy.
At the top of the shot on a slingshot ride, your potential energy is greater than your kinetic energy. Thus, the correct response is B. The kinetic energy is less than potential energy.
Rebecca climbs the ladder of a large water slide, waits her turn at the top, and then slides down the slide into a pool. Which answer best describes the energy changes during her time on the slide?(1 point)
Responses
A. potential → mechanical → kinetic
B. kinetic → mechanical → potential
C. kinetic → potential → kinetic
D. potential → kinetic → potential
The correct answer is D. potential → kinetic → potential.
At the top of the slide, Rebecca has potential energy due to her position above the ground (potential energy). As she slides down the slide, this potential energy is converted into kinetic energy as she gains speed (kinetic energy). When she reaches the bottom of the slide and comes to a stop in the pool, her kinetic energy is converted back into potential energy due to her raised position in the water (potential energy).
Convection ovens cook food more evenly than a standard thermal oven. Which statement explains how a convection oven works?(1 point)
Responses
Hot air is transferred through density differences when cool air rises and hot air sinks.
Hot air is transferred through density differences when hot air rises and cool air sinks.
Hot air is transferred through direct molecule contact.
Hot air is transferred when heat radiates from a thermal burner.
The correct answer is: Hot air is transferred through density differences when hot air rises and cool air sinks.
In a convection oven, a fan circulates the hot air inside the oven. The hot air rises due to its lower density, while the cooler air sinks. This circulation of hot and cool air results in more even heating and cooking of the food. Therefore, the statement that explains how a convection oven works is that hot air is transferred through density differences when hot air rises and cool air sinks.
An object’s gravitational potential energy depends on the object’s mass, the strength of the gravitational field, and what other variable?(1 point)
An object’s gravitational potential energy depends on the object’s mass, the strength of the gravitational field, and what other variable?(t
To determine which object has the least amount of kinetic energy, we need to understand the concept of kinetic energy and how it is related to the motion of an object.
The formula for kinetic energy is:
Kinetic Energy = 1/2 * mass * velocity^2
From the given information, we know that both objects have the same size and mass. However, since Object 1 was released before Object 2, it would have had more time to accelerate and gain velocity.
Therefore, Object 1 is moving faster than Object 2, which means it has a higher velocity. Since kinetic energy is directly proportional to the square of velocity, Object 1 would also have a higher kinetic energy compared to Object 2.
Hence, the correct answer is:
A. Object 1