A man is dragging a
trunk up the loading ramp of a
mover's truck. The rarnp has a
slope angle of 20.0", and rhe rnan
pu lls upward with a lbrcc F
whose direction makes an
angle of 30 0' with the ramp
(Fig. la. ). (a) How large a
force F is necessary for the
component F, palallel to the
rarnp [o bc 90.0 N? (b) How
Figure "l
li"*i
large will the component F,. pelpendicular to the ramp be therr?