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Four aliens are on Earth playing a game on a see-saw. There are 4 seats on the sea-saw. The end seats are 2m from the pivot, the middle seats are 1m from the pivot. They want to try to sit on the sea-saw together and make it balance. They can only sit on the seats, nowhere else on the see-saw. Can they do it? 

Alien 1: 100N

Alien 2: 200N

Alien 3: 300N

Alien 4: 400N

 Apr 27, 2020
 #1
avatar+21017 
+1

I don't think so.

The odd-numbered aliens must either both sit in the 1m or 2m seats; but there is no combination that works.

 Apr 27, 2020
 #2
avatar+633 
+1

Alien 2 and 3 sit on a side. While Alien 1 and 4 sit on the other side. So yes, these playful aliens can do it!

 Apr 27, 2020
 #3
avatar+1904 
+1

AELN, your answer is wrong! Apparently, you don’t understand what an inertial moment is.

There are 24 possible arrangements for the weights, and none of these arrangements will balance the see saw.

There is no solution to this problem.

GingerAle  Apr 27, 2020

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