A5 kg block is pulled across a table by a horizontal force of 40 N with a frictional force of
8 N. What is the net force acting on the block?

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.