We'll solve this problem using the sum of forces for a system in equilibrium.

For a system in equilibrium:

$\overline{){\mathbf{\Sigma}}{{\mathbf{F}}}_{\mathbf{u}\mathbf{p}}{\mathbf{=}}{\mathbf{\Sigma}}{{\mathbf{F}}}_{\mathbf{d}\mathbf{o}\mathbf{w}\mathbf{n}}}$

The uniform rod in Figure 15 has a weight of 14.0 N. What is the magnitude of the normal force exerted on the rod by the surface?

A. 7N

B. 14 N

C. 20 N

D. 28N

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Torque Due to Weight concept. You can view video lessons to learn Torque Due to Weight. Or if you need more Torque Due to Weight practice, you can also practice Torque Due to Weight practice problems.