please solve

Period '10 Exercises: Simple Machines - Pulley Systems White answers to the questions below Show your mathematical steps and the units of the quantities. This sheet with your answers should be turned in at the beginning of Period 11. '19 Finding mechanical advantage and efficiency: The pulley system shown requires 35 pounds of force to lift a 50 pound load. a) What is the actual maehanioai advantage of this pulley system? b) What is its ideal mechanical advantage? is) What is the efciency of this system? 2. Using reasoning to solve problems: You want to lift a BOO-lb car engine using an 8-foot long lever. The maximum force in you can apply is 100 lbs. How long should the lever arm and load arm be so that you can just lift the engine with this lever? (The total length of the load arm plus the lever arm is 8 feet. Assume that the lever is frictionless.) E, Total length = 8' ft Lever Arm 7 , Load Arm