This preview shows page 1. Sign up to view the full content.
33. The problem intends for the children to be completely above water. The total
downward pull of gravity on the system is
()
wood
3 356 N
Ng
V
ρ
+
where
N
is the (minimum) number of logs needed to keep them afloat and
V
is the
volume of each log:
V
=
π
(0.15 m)
2
(1.80 m) = 0.13 m
3
. The buoyant force is
F
b
=
water
gV
submerged
where we require
This is the end of the preview. Sign up
to
access the rest of the document.
 Spring '08
 Any
 Physics, Gravity

Click to edit the document details