17.34: A 9.20 m long uniform plank rests on a frictionless ice pond. A 52 kg b
aw3y7khmv7*dsy / q;box rests on the plank’s left end while a 71 kg person stands at the plank’s right end. After the person walks to the left o
bym d ksa/7qy w37;*hvn the plank and stands at the same location as the box, the plank has slid 3.84 m to the right relative to the pond’s shore. Which one of the following choices best represents the mass of the plank?