Question
Why is Newton's cradle an "almost-ideal" system?(1 point)
Responses
The balls continue on for an unlimited amount of time.
The balls continue on for an unlimited amount of time.
Friction and air resistance cause the balls to slow down eventually and stop.
Friction and air resistance cause the balls to slow down eventually and stop.
The system would work more efficiently if more balls were added.
The system would work more efficiently if more balls were added.
Friction and air resistance are negligible and the system continues to move indefinitely.
Friction and air resistance are negligible and the system continues to move indefinitely.
Question 2
Which choice below is an example of a perfectly closed system?(1 point)
Responses
An automobile moving down the highway. Energy transfer only occurs inside the motor.
An automobile moving down the highway. Energy transfer only occurs inside the motor.
Newton's cradle. The energy transfer only occurs between the balls.
Newton's cradle. The energy transfer only occurs between the balls.
A cup of tea with a lid on it. energy transfer takes place with the cup and the surroundings, but no matter leaves the tea.
A cup of tea with a lid on it. energy transfer takes place with the cup and the surroundings, but no matter leaves the tea.
A cup of water with ice in it, open to the air.
Responses
The balls continue on for an unlimited amount of time.
The balls continue on for an unlimited amount of time.
Friction and air resistance cause the balls to slow down eventually and stop.
Friction and air resistance cause the balls to slow down eventually and stop.
The system would work more efficiently if more balls were added.
The system would work more efficiently if more balls were added.
Friction and air resistance are negligible and the system continues to move indefinitely.
Friction and air resistance are negligible and the system continues to move indefinitely.
Question 2
Which choice below is an example of a perfectly closed system?(1 point)
Responses
An automobile moving down the highway. Energy transfer only occurs inside the motor.
An automobile moving down the highway. Energy transfer only occurs inside the motor.
Newton's cradle. The energy transfer only occurs between the balls.
Newton's cradle. The energy transfer only occurs between the balls.
A cup of tea with a lid on it. energy transfer takes place with the cup and the surroundings, but no matter leaves the tea.
A cup of tea with a lid on it. energy transfer takes place with the cup and the surroundings, but no matter leaves the tea.
A cup of water with ice in it, open to the air.
Answers
GPT-4o mini
For your first question, the correct response is:
**Friction and air resistance cause the balls to slow down eventually and stop.**
Newton's cradle is considered an "almost-ideal" system because, in reality, factors like friction and air resistance cause the balls to lose energy over time, eventually leading to them stopping.
For your second question, the correct choice for an example of a perfectly closed system is:
**Newton's cradle. The energy transfer only occurs between the balls.**
In an ideal scenario, Newton's cradle demonstrates a closed system where energy is transferred between the balls without any loss to the environment. However, it’s important to note that in practice, it's not perfectly closed due to factors like friction and air resistance.
**Friction and air resistance cause the balls to slow down eventually and stop.**
Newton's cradle is considered an "almost-ideal" system because, in reality, factors like friction and air resistance cause the balls to lose energy over time, eventually leading to them stopping.
For your second question, the correct choice for an example of a perfectly closed system is:
**Newton's cradle. The energy transfer only occurs between the balls.**
In an ideal scenario, Newton's cradle demonstrates a closed system where energy is transferred between the balls without any loss to the environment. However, it’s important to note that in practice, it's not perfectly closed due to factors like friction and air resistance.