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?