Equilibrium: A 20.0-kg uniform plank is supported by the floor at one end and by a vertical rope at the other as shown in the figure. A 50.0-kg mass person stands on the plank a distance three-fourths of the length plank from the end on the floor. 
(a) What is the tension in the rope?
(b) What is the magnitude of the force that the floor exerts on the plank?
Definitions:
Eugenics
The controversial science aimed at improving the genetic quality of the human population through selective breeding.
Sex Selection
The practice of using medical techniques to choose the sex of offspring, often raising ethical and social concerns.
Incest Potential
The possibility of sexual relations between closely related individuals, which is often legally and socially prohibited.
Single Mothers
Women who are raising their child or children without the involvement of the child's father, either by choice or circumstance.
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