This preview shows page 1. Sign up to view the full content.
46. (a) Since constant speed implies
Δ
K
0,
=
we require
WW
ag
=−
, by Eq. 715. Since
W
g
is the same in both cases (same weight and same path), then
2
9.0 10
a
W
=×
J just as it
was in the first case.
(b) Since the speed of 1.0 m/s is constant, then 8.0 meters is traveled in 8.0 seconds.
Using Eq. 742, and noting that average power is
This is the end of the preview. Sign up
to
access the rest of the document.
 Spring '08
 Any
 Physics

Click to edit the document details