winnie a waitress holds in one hand a 5.0-N tray stacked with twelve 3.5 N dishes. The length of her arm from her hand to her elbow is 30.0 cm and her biceps muscle exerts a force 5.0 cm from her elbow which acts as a fulcrum. How much force must her biceps exert to allow her to hold the tray?
15. The Ramseys are moving to a new towns. so they have called in the ACME moving company to take care of their furiture. Debbie, one of the movers, slides the Ramsey's 200-N china cabinet up a 6.0-m-long ramp to the moving van, which stands 1.0 m off the ground. a) what is the ideal mechanical advantage of the incline? b) If Debbie must exert a 500-N force to move the china cabinet up the ramp with a constant speed, what is the actual mechanical advantage of the ramp? c) what is the efficiency of the ramp?
15. The Ramseys are moving to a new towns. so they have called in the ACME moving company to take care of their furiture. Debbie, one of the movers, slides the Ramsey's 200-N china cabinet up a 6.0-m-long ramp to the moving van, which stands 1.0 m off the ground. a) what is the ideal mechanical advantage of the incline? b) If Debbie must exert a 500-N force to move the china cabinet up the ramp with a constant speed, what is the actual mechanical advantage of the ramp? c) what is the efficiency of the ramp?