Physics 201 Homework
... There are three forces here. The support force from the hands, the feet, and the person’s weight. We need to choose an axis of rotation. Any axis will work because the system is at rest, in equilibrium. There are three natural places to consider: each place where there is a force. Whichever point we ...
... There are three forces here. The support force from the hands, the feet, and the person’s weight. We need to choose an axis of rotation. Any axis will work because the system is at rest, in equilibrium. There are three natural places to consider: each place where there is a force. Whichever point we ...
Rotation Torque, Rolling, & Angular Momentum
... Two 2.00 kg balls are attached to the ends of a thin rod of length 50.0 cm and negligible mass. The rod is free to rotate in a vertical plane without friction about a horizontal axis through its center. With the rod initially horizontal (see figure), a 50.0 g wad of wet putty drops onto one of the b ...
... Two 2.00 kg balls are attached to the ends of a thin rod of length 50.0 cm and negligible mass. The rod is free to rotate in a vertical plane without friction about a horizontal axis through its center. With the rod initially horizontal (see figure), a 50.0 g wad of wet putty drops onto one of the b ...
V. Angular momentum
... Static friction wheel does not slide smooth rolling motion aCOM = α R ...
... Static friction wheel does not slide smooth rolling motion aCOM = α R ...
6 - JustAnswer
... 7. A body that weighs 50lb is placed in contact with an inclined plane surface. The coefficient of friction between the surfaces is 0.25 and the angle between the inclined surface and the horizontal reference plane in 28 degrees. In order to keep the body from sliding, by using an applied force whos ...
... 7. A body that weighs 50lb is placed in contact with an inclined plane surface. The coefficient of friction between the surfaces is 0.25 and the angle between the inclined surface and the horizontal reference plane in 28 degrees. In order to keep the body from sliding, by using an applied force whos ...
force of friction - ShareStudies.com
... Application Cont’d What speed would the ball have as it passes over the top of the circle if the tension in the cord goes to zero instantaneously? v2 ...
... Application Cont’d What speed would the ball have as it passes over the top of the circle if the tension in the cord goes to zero instantaneously? v2 ...
Action - University of Toronto Physics
... B. The acceleration of an object is proportional to the net force on it, and inversely proportional to the object’s mass. C. If object 1 exerts a force on object 2, object 2 exerts an equal and opposite force on object 1. D. All bodies attract one another with a force that is proportional to the pro ...
... B. The acceleration of an object is proportional to the net force on it, and inversely proportional to the object’s mass. C. If object 1 exerts a force on object 2, object 2 exerts an equal and opposite force on object 1. D. All bodies attract one another with a force that is proportional to the pro ...
Rolling resistance
Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface. It is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc. is recovered when the pressure is removed. Two forms of this are hysteresis losses (see below), and permanent (plastic) deformation of the object or the surface (e.g. soil). Another cause of rolling resistance lies in the slippage between the wheel and the surface, which dissipates energy. Note that only the last of these effects involves friction, therefore the name ""rolling friction"" is to an extent a misnomer.In analogy with sliding friction, rolling resistance is often expressed as a coefficient times the normal force. This coefficient of rolling resistance is generally much smaller than the coefficient of sliding friction.Any coasting wheeled vehicle will gradually slow down due to rolling resistance including that of the bearings, but a train car with steel wheels running on steel rails will roll farther than a bus of the same mass with rubber tires running on tarmac. Factors that contribute to rolling resistance are the (amount of) deformation of the wheels, the deformation of the roadbed surface, and movement below the surface. Additional contributing factors include wheel diameter, speed, load on wheel, surface adhesion, sliding, and relative micro-sliding between the surfaces of contact. The losses due to hysteresis also depend strongly on the material properties of the wheel or tire and the surface. For example, a rubber tire will have higher rolling resistance on a paved road than a steel railroad wheel on a steel rail. Also, sand on the ground will give more rolling resistance than concrete.