A 50 lb child is sitting on one end of a seesaw, 3 ft from the center fulcrum. (See Figu...

A 50 lb child is sitting on one end of a seesaw, 3 ft from the center fulcrum. (See Figure 1.69.) When she is

1.5 ft above the horizontal position, what is the amount of torque she exerts on the seesaw?