Calvin, who weighs 300N, sits at one end of a seesaw. The seesaw is 5m long and weighs 500N. Hobbes, who weighs 400N, sits on the other side of the seesaw. Hobbes does not sit all the way at his end of the seesaw; rather, Hobbes sits 1m from his end of the seesaw.
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Fig IA: Seesaw (Calvin & Hobbes included)
What is the net torque on the seesaw about the pivot point in the middle?