J'ai une masse de 70 kg et je cours à 30 m/s.
Je cours à 55 km/h
et je pèse 0,7t
Oc
Lequel des deux a le plus d'énergie cinétique ? Justifie​

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.