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.
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.
The system would work more efficiently if more balls were added.
The system would work more efficiently if more balls were added.
Question 2
Which choice below is an example of a perfectly closed system?(1 point)
Responses
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 water with ice in it, open to the air.
A cup of water with ice in it, open to the air.
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.
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.
1 answer
Why is Newton's cradle an "almost-ideal" system?
Correct Response: Friction and air resistance cause the balls to slow down eventually and stop.
Which choice below is an example of a perfectly closed system?
Correct Response: 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.
