Three forces are being exerted on a common object. Two of the forces are acting downward with values of 20 N and 45 N respectively. The third force (15 N) is being exerted upward
on the same object. What should the magnitude and direction of the net force acting on the
object be? Include a free body diagram.

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

There are weak or strong attractive forces between atoms of liquids with a high viscosity

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.