BCR: Points: SHOW ALL WORK AND FORMULAS TO GET MAXIMUM POINTS 1. A construction crew lifts approximately 400 Ib. of material several times during a day from a flatbed truck to a 25 ft. rooftop. A...

Extracted text: BCR: Points: SHOW ALL WORK AND FORMULAS TO GET MAXIMUM POINTS 1. A construction crew lifts approximately 400 Ib. of material several times during a day from a flatbed truck to a 25 ft. rooftop. A block and tackle system with 75 lb. of effort force is designed to lift the materials. a). What is the displacement(distance).by the effort force? b). What is the Ideal Mechanical Advantage of the system? 2. A/e nut driver with a 1% inch diameter handle is used to install a % 24 UNC 2B machine screw into a robotic motor. What is the mechanical advantage gained in the system? 3. A gardener uses a wheelbarrow to carry a bag of mulch (decaying leaves, bark and compost) that weighs 150 lbs. and requires 60 Ibs. of effort. The distance from the wheel's axle to the effort is 8 feet. a). What is the Actual Mechanical Advantage of the Wheelbarrow? b). What is the distance from the Wheel's axle to the Load?