While riding in your boat, you notice one wave pass by every two seconds. if the actual frequency of the waves is 1 hz, with what speed are you moving through the water? (the speed of the waves is 5 m/sec.)
a. 1m/2s towards the waves
b. 5m/2s towards the waves
c. 5 m/s away from the waves
d. 5m/2s away from the waves
e. 1m/2s away from the waves

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.