False. When sliding a bag of groceries, you are overcoming sliding friction, not rolling friction. Rolling friction occurs when a round object like a wheel rolls along a surface.
Sliding friction typically requires more force to overcome compared to rolling friction. Rolling friction occurs when an object rolls over a surface, which reduces the contact area and frictional force, while sliding friction involves two surfaces rubbing against each other with a larger contact area, resulting in higher resistance.
Coefficient of rolling friction will always be less than that of sliding friction. Hence more force is required to overcome sliding friction. Because the force = coefficient of friction x normal force (ie weight of the body)
The static friction between the wheels of the wagon and the surface it's resting on prevents it from rolling until a force is applied to overcome this friction and set the wagon in motion.
Static friction is typically weaker than kinetic and rolling friction because it requires less force to overcome the initial resistance of an object at rest. Once an object is in motion, kinetic and rolling friction require less force to maintain movement compared to overcoming static friction.
Riding a bike experiences rolling friction because the tires are in contact with the ground and the force needed to overcome the resistance of the surface and keep the wheels rolling creates this friction. The deformation of the tire as it grips the ground and the energy loss due to internal friction within the tire also contribute to rolling friction.
If the bag is sliding across the countertop (i.e., the same surface of the bag is always in contact with the counter), then no. Rolling friction is only relevant when the surface of an object in contact with the surface it moves across always changes.
Rolling friction results from momentary attractions between a rolling object and the surface it is rolling on, so as long as the same surface of the bag is always facing the surface, as is usually true for sliding, there is no rolling friction to consider.However, for sliding, there are two different values for friction: the static value, which is how much force must be applied to a resting object to start moving it across a surface; and the dynamic value, which is how much force must be applied to a moving object to make it keep moving with the same velocity.
rolling
Sliding friction requires more force to overcome its friction.
Sliding friction requires more force to overcome its friction.
Sliding friction requires more force to overcome its friction.
Sliding friction requires more force to overcome its friction.
Sliding friction requires more force to overcome its friction.
Sliding Friction
sliding friction
Sliding Friction
Sliding friction typically requires more force to overcome compared to rolling friction. Rolling friction occurs when an object rolls over a surface, which reduces the contact area and frictional force, while sliding friction involves two surfaces rubbing against each other with a larger contact area, resulting in higher resistance.