You need to set up another simple ramp using the board from part a (i. e., a board of length 1.56 m . (figure 5 if the ramp must be at a 25? angle above the ground, how far back from the bed of the truck should the board touch the ground? assume this is a different truck than the one from part
a.

d=1.413m

Explanation:

You need to set up another simple ramp using the board from part a (i.e., a board of length 1.56 m . (figure 5 if the ramp must be at a 25? angle above the ground, how far back from the bed of the truck should the board touch the ground? assume this is a different truck than the one from part

a.

to get the distance , we need to take into account the trigonometry of a right angle triangle .

tan of an angle is=opposite/adjacent

sin of an angle=opposite/hypotenuse

cosine of an angle=Adjacent/Hypotenuse

so since we are looking for the parallel distance between the bed of the truck and the point the board touch the ground

cos25=d/1.56

d=1.56cos25

d=1.413m

distance of the ramp from the bed of the truck 1.413m

i think the answer is a, hope this is right, that would be my best guess.