FILE No.155Unsolved
Clunk! Suddenly the breaker tripped. When I went to the breaker, there was a weight there, and a string hung from the weight. The other end of the string was tied to the breaker's lever. The floor was soaked, and under the weight was a square patch of cold water.
After I flipped the breaker back up and returned to the room, my little brother was playing a game in the room (at the moment the breaker tripped, he was with me). Even so, this was my brother's prank.
What kind of trick did he set up?
If you get stuck, open the hints one at a time, in order.
Why was the floor soaked?
Where was my brother when the breaker tripped?
What changes as time passes?
What kind of trick did he set up?
Choose the answer closest to the truth.
Placed the weight on ice; when the ice melted, the weight dropped and pulled the string
The answer is "Placed the weight on ice; when the ice melted, the weight dropped and pulled the string."
My brother set the weight on top of ice. When the ice melted, the weight dropped, pulled the string, and lowered the lever. The water on the floor is the melted ice. Because of the time delay, he could carry it out without being at the scene.
No magnet or motor remained at the scene. There is no basis for a mouse having pulled it.
Because you think he must have been at the scene.
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