An object falls through the air, gaining speed as it falls. A student claims that this creates new energy, and so it breaks the law of conservation of energy. Which statement describes why the student is incorrect?(1 point)

Question

Responses

Equal and opposite amounts of other energy are also created.
Equal and opposite amounts of other energy are also created.

Speed is not related to energy in any way.
Speed is not related to energy in any way.

Energy can be created without breaking the law of conservation of energy.
Energy can be created without breaking the law of conservation of energy.

Energy is converted from other forms, not created.

Answer 1

The correct statement that describes why the student is incorrect is:

Energy is converted from other forms, not created.

As the object falls, its gravitational potential energy is converted into kinetic energy, which accounts for the increase in speed without violating the law of conservation of energy.

Answer 2

A person throws a ball up into the air, and the ball falls back toward Earth. At which point would the kinetic energy be the lowest?(1 point)
Responses

at a point when the ball is still rising
at a point when the ball is still rising

at a point before the ball hits the ground
at a point before the ball hits the ground

when the ball leaves the person’s hand
when the ball leaves the person’s hand

when the ball is at its highest point

Answer 3

The point at which the kinetic energy of the ball would be the lowest is:

when the ball is at its highest point.

At this highest point, the ball's speed is momentarily zero before it starts to fall back down, resulting in the lowest kinetic energy.

Answer 4

A book is at rest on a flat table. A person gives the book a shove and it slides across the table. The book eventually comes to rest again near the edge of the table. How does the potential and kinetic energy change during this process?(1 point)
Responses

The potential and kinetic energy are the same while the book is sitting on the table. They both increase when the book is shoved and then decrease as the book comes to rest again.
The potential and kinetic energy are the same while the book is sitting on the table. They both increase when the book is shoved and then decrease as the book comes to rest again.

The potential energy increases as the book is pushed across the table. The kinetic energy stays the same since the book was shoved.
The potential energy increases as the book is pushed across the table. The kinetic energy stays the same since the book was shoved.

The potential stays the same since the book is on the table. The kinetic energy stays the same since the book was only shoved.
The potential stays the same since the book is on the table. The kinetic energy stays the same since the book was only shoved.

The potential energy will stay the same as long as the book stays on the table. The kinetic energy increases when the book is shoved and then gradually decreases as it slides across the table and then comes to rest on the edge.

Answer 5

The correct response is:

The potential energy will stay the same as long as the book stays on the table. The kinetic energy increases when the book is shoved and then gradually decreases as it slides across the table and then comes to rest on the edge.

While the book is on the table, its potential energy remains constant. When the person shoves the book, its kinetic energy increases due to the shove. As the book slides and eventually comes to rest, the kinetic energy decreases due to friction.

Answer 6

Which is a good description of potential energy?(1 point)
Responses

energy of reaction
energy of reaction

energy of motion
energy of motion

conserved energy
conserved energy

stored energy

Answer 7

The best description of potential energy is:

stored energy.

Potential energy is the energy that is stored in an object due to its position or configuration, which can be converted into kinetic energy when the object is in motion.