Final answer:
Zane and Phoebe exert a total torque of 1568 Nm on the teeter-totter.
The correct ootion is not given.
Step-by-step explanation:
To calculate the torque exerted by Zane and Phoebe on the teeter-totter, we need to consider the weight of each person and their respective distances from the pivot point. The torque is given by the formula:
Torque = Force * Distance
Zane, who weighs 473 N, is sitting at one end of the teeter-totter, which is 4 m long. Since the pivot point is in the exact center, Zane's distance from the pivot is 2 m. Therefore, his torque would be:
Torque_Zane = 473 N * 2 m = 946 Nm
Phoebe, who weighs 311 N, is sitting at the other end of the teeter-totter. Her distance from the pivot is also 2 m. Therefore, her torque would be:
Torque_Phoebe = 311 N * 2 m = 622 Nm
So, the total torque exerted by Zane and Phoebe on the teeter-totter is the sum of their individual torques:
Total_Torque = Torque_Zane + Torque_Phoebe = 946 Nm + 622 Nm = 1568 Nm
The correct ootion is not given.