Answer:
Answer
We apply the definition of work by a
constant force in the first three partts,
but then in the fourth part we add up
the answers. The total (net) work is the
sum of the amounts of work done by the
individual forces, and is the work done
by the total (net) force. This identification
is not represented by an equation in the
chapter text, but is something you know
by thinking about it, without relying on an
equation in a list.
The definition of work by a constant force
is W-FArcose.
(a) The applied force does work given by
W-FArcose=(16.ON)(2.20m)cos25.0
O
=31.9J
(b), (c) The normal force and the weight
are both at 90
to the displacement in any time interval.
Both do work.
(d) W=31.9J+0+0=31.9J
ebondasjonalyn Virtuoso
