Question 5 of 10 Which of the following describes an action-reaction pair?
A. You push on a car, and the car pushes back on you.
B. You push down on your shoe, and Earth's gravity pulls down on the
shoe.
C. The Moon pulls on Earth, and Earth pulls on the Sun.
D. A book pushes down on a table, and the table pushes down on the
Earth

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.