A shelf with a mass 11kg and length 2.0 m is attached to the pivot, at which the shelf can rotate. W is the weight force of the shelf acting at the center of  mass of the shelf, which is located halfway from either end of the shelf. The box of mass 5.0 kg is placed at 1.6 m away from the pivot and Fbox  represents the force the box applies to the shelf. If you lift the shelf with force F - 94.3 N at the right end of the shelf and the direction as shown(down) What is the net torque on the shelf in N m?  Round to nearest tenths if necesaary. If the torque is clockwise, report answer with a negative value. Use g= 9.8 m/s ^2 for the acceleration due to gravity.

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