The wood post has a square cross section of side length, l. the top of the post is subjected to an eccentric load, p. determine the minimum value of dimension “a” that causes zero net normal stress in the x-direction at point a at the base of the post. the post has a height, h. p

To practice problem-solving strategy 10.1 for energy conservation problems. a sled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slides a distance d1 down the slope and then covers the distance d2 along the horizontal terrain before stopping. find the coefficient of kinetic friction μk between the sled and the ground, assuming that it is constant throughout the trip.