Back to subcatalog.
The concept of the frictionless pully is to be interpreted as a pulley
that turns without resistance as the rope passes over it OR that a
rope slips over the pulley without resistance. That does not mean
that a rope will not have tension in it. The source of the tension
however will be due to whatever forces are acting on the ends of the
rope. Also a frictionless pulley does not mean that it does not have
a rotational moment of inertia. This becomes important if significant
rotational energy can be stored in the pulley. A frictionless pulley
simply means that there are no energy losses from a pulley system
through friction on the axle of the pulley or from contact of the rope
with the pulley.
Back to