Suppose a 34.5-kg child sits 1.17 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.
2 answers
a) 34.5/(L/2) x 1.17= weight of second child (kg)
b) weight of second child+34.5 kg+weight of plank (given in part B in the practice it)multiplied by 9.8= N
1 answer