Safari File Edit View History Bookmarks Window Help ON 28 46% Thu 9:44 PM Q DE E webassign.net C 888 st Q Oakland University Mi New Message from Genette DiLuca in Mr... In Oakland University Moodle: Log in to th... W Phy 1010 - W22 - Chapter 8 - PHY 101.. C A Woman Of Mass M = 52.8 Kg Sits O.. PRACTICE IT Use the worked example above to help you solve this problem. A woman of mass m = 52.8 kg sits on the left end of a seesaw-a plank of length L = 4.40 m, pivoted in the middle as shown in the figure. (a) First compute the torques on the seesaw about an axis that passes through the pivot point. Where should a man of mass M = 71.8 kg sit if the system (seesaw plus man and woman) is to be balanced? 0.582 X Your response differs from the correct answer by more than 10%. Double check your calculations. m (b) Find the normal force exerted by the pivot if the plank has a mass of mp = 12.6 kg. 124.57 X N (c) Repeat part (a), but this time compute the torques about an axis through the left end of the plank. 12.87 X Your response differs from the correct answer by more than 100%. m EXERCISE HINTS: GETTING STARTED | I'M STUCK! Suppose a 29.2-kg child sits 1.23 m to the left of center on the same seesaw as the problem you just solved in the PRACTICE IT section. A second child sits at the end on the opposite side, and the system is balanced (a) Find the mass of the second child. 12.87 X Use the pivot as the reference point because then two of the four forces on the plank exert zero torque. Which two? Since the plank is at rest, the torques due to the other two forces must balance kg (b) Find the normal force acting at the pivot point. 42.05 X How many forces are exerted on the plank? How many are pointed up? How many are pointed down? Note that the plank is at rest, which means the force on the plank is zero N The TeraTIONS among ValaDIes Stand OUT more CleanIV. STIGERS CamaISO Observe Ine ValaIV OI Page:1 O- O + 130 %