Giancoli 7th Edition textbook cover
Giancoli's Physics: Principles with Applications, 6th Edition
Rotational Motion
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8-1: Angular Quantities
8-2 and 8-3: Constant Angular Acceleration; Rolling
8-4: Torque
8-5 and 8-6: Rotational Dynamics
8-7: Rotational Kinetic Energy
8-8: Angular Momentum
8-9: Angular Quantities as Vectors

Problem 25
mg(L1L2)mg(L_1 - L_2)
Giancoli 6th Edition, Chapter 8, Problem 25 solution video poster

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By xueyang.peng on Sat, 2/22/2014 - 1:55 AM

why does the one on the left go counter clockwise and the right one go clockwise?

By Mr. Dychko on Sat, 2/22/2014 - 5:59 AM

The mass on the left results in a torque that's counterclockwise since the mass is positioned on the left side of the fulcrum. This says nothing about which direction it "goes", just that the direction of torque (which has similarities with force) is counterclockwise.

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