*This preview shows
page 1. Sign up
to
view the full content.*

6.2:
a) “Pulling slowly” can be taken to mean that the bucket rises at constant speed, so
the tension in the rope may be taken to be the bucket’s weight. In pulling a given length
of rope, from Eq. (6.1),
J.
6
.
264
)
m
00
.
4
)(
s
/
m
80
.
9
(
)
kg
75

This is the end of the preview. Sign up
to
access the rest of the document.

**Unformatted text preview: **. 6 ( 2 = = = = mgs Fs W b) Gravity is directed opposite to the direction of the bucket’s motion, so Eq. (6.2) gives the negative of the result of part (a), or J 265-. c) The net work done on the bucket is zero....

View
Full
Document