You and a friend are unloading your motorcycle off of a pickuptruck using an 8ft long 2"x12" plank which has a mass of 28 kg. Youslide the plank off the back end of the pickup truck so that it ishorizntal with the flat ground. (a) When very end of the plank is lying on the lip of the pickuptruck bed, what force do you need to apply to the other end?
N
(b) To play with you, your friend, who has a mass of 64 kg walksout a distance 3 ft along the plank while you are holding it. Whatforce do you need to apply now to support both the plank and yourfriend?
Your response differs from the correct answer by more than 10%.Double check your calculations. N
(c) What force does the truck apply to the other end of the plankto support the plank and your friend? N
