[ 451 ] Physical Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • The mechanical advantage (MA) of a machine is a measure of how much the machine multiplies the input force applied to it. MA = Input Force Load Load Input Force The table shows the input force required to lift different loads using the pulley system shown in the illustration. Load (N) Input Force (N) 30 10 60 20 90 30 150 50 A one Newton load has a mass of 10 grams. According to the table, what is the maximum mass that can be lifted by the pulley system using an input force of 50 Newtons? A. 15 grams B. 50 grams C. 150 grams D. 1,500 grams