7-23. A girl pulls a toboggan of mass 4.81 kg up
a hill inclined at 25.7° to the horizontal. The vertical height of
the hill is 27.3 m. Neglecting friction between the toboggan and the
snow,
determine how much work the girl must do on the toboggan to pull it at
constant velocity up the hill. [Ans. 1.29X103 J]
ACCUMULATED SOLUTION
Correct!
There are two ways to solve this problem. The
most
obvious is to find the work done by
F.
F is given by:
(A) F = mg
(B) F = mg
cosq
(C) F = mg sinq