A 15-Kg Child Is Sitting on a Playground Teeter-Totter,1

Multiple Choice

A 15-kg child is sitting on a playground teeter-totter,1.5 m from the pivot.What is the magnitude of the minimum force,applied 0.30 m on the other side of the pivot,that is needed to make the child lift off the ground?

A) 75 N
B) 740 N
C) 23 N
D) 44 N
E) 66 N