9. What is the tension in the rope that joins the two blocks that are pulled by a constant force of 500 N in the diagram below: 10 kg = 0.12 20 kg 10. Safety engineers estimate that an elevator can hold 15 persons of 80 kg average mass. The elevator itself has a mass of 500 kg. Tensile strengths show that the cable supporting the elevator can withstand a maximum force of 2.85 x 10 N. What is the greatest acceleration that the elevator can attain without breaking the cable?