A mechanical lift is used to raise a heavy load. The lift consists of a horizontal platform of length L drawn by vertical cables on either end of the platform. The platform has a mass m. The load has mass 4m and is placed a distance L/4 from the right end of the lift. The acceleration due to gravity is g. What is the tension in the right vertical cable?
1. (2/3) mg
2. (2/7) mg
3. (7/2) mg
4. (3/2) mg
5. (7/4) mg
6. (4/5) mg
8. (1/3) mg
9. (5/4) mg
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