This image shows the direction of the flow of water through a constricted pipe. Which of the following happens as you move from position A to position
B in the water pipe?
a.) the cross section
b.) the density of water decreases
c.) The velocity of the water decreases
d.) The pressure of the water increases

Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tiny nudge so that it begins to slide down, through what vertical height will it descend before it leaves the surface of the sphere? [hint: use conservation of energy to find the puck's speed as a func e conservation of energy to find the puck's speed as a function of its height at what value of this normal force does the puck leave the sphere? ] here on the puck.