Experiment of December 11, 2025:

The time to submit an answer is over. You can now view the solution of the experiment.

Solution video:

Experiment:

Question:

What happens when he lets go of the Slinky spiral spring?

A) The spiral spring contracts from bottom to top. The upper end remains stationary at first, and the key is pulled up.

B) The spiral spring contracts from top to bottom. The lower end with the key remains stationary at first, while the upper part of the spring is pulled down.

C) The spiral spring contracts from the top and bottom towards the centre. The key is also pulled towards the centre.

D) The spiral spring does not contract. It remains stretched out and falls to the ground in this state.