In theory, what would be the approximate weight gain of a person who consumes an excess of 500 kcal every day for four weeks (e. g., about 28 days)?
a) 0.5 lbs
b) 2 lbs
c) 3 lbs
d) 4 lbs

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.