PM6 FRICTION
... The presence of surface layers can result in a breakdown of the F = mN relationship - the coefficient of friction µ can vary with the load N. This can happen if the layers are such that they remain intact at low loads but break down at higher loads. The coefficient of friction then changes from that ...
... The presence of surface layers can result in a breakdown of the F = mN relationship - the coefficient of friction µ can vary with the load N. This can happen if the layers are such that they remain intact at low loads but break down at higher loads. The coefficient of friction then changes from that ...
additional assignments
... stopping. (a) Find the maximum angular speed of the gyroscope in rad/s and rpm. (b) What are the rates of angular acceleration and angular deceleration? (c) Find the total number of revolutions the gyroscope will spin. 8. As shown below a square metal plate with sides of length 20.0 cm is subject to ...
... stopping. (a) Find the maximum angular speed of the gyroscope in rad/s and rpm. (b) What are the rates of angular acceleration and angular deceleration? (c) Find the total number of revolutions the gyroscope will spin. 8. As shown below a square metal plate with sides of length 20.0 cm is subject to ...
Speed on Land - Lake Mills Area School District
... Mass is the weight of the vehicle. There is a difference between the mass of an object and how much it weighs. Mass is a measure of the amount of matter or material an object contains. Weight takes in to account the gravitational pull. For example, the moon's gravitational pull is much less than the ...
... Mass is the weight of the vehicle. There is a difference between the mass of an object and how much it weighs. Mass is a measure of the amount of matter or material an object contains. Weight takes in to account the gravitational pull. For example, the moon's gravitational pull is much less than the ...
July 2016 Exam Review
... Recall that the centripetal acceleration of the stone is v2/r, and if the speed is constant, then so is the centripetal acceleration. How can it be that the centripetal acceleration, which points towards the centre of the circle, is constant even though the direction of the weight force, which is do ...
... Recall that the centripetal acceleration of the stone is v2/r, and if the speed is constant, then so is the centripetal acceleration. How can it be that the centripetal acceleration, which points towards the centre of the circle, is constant even though the direction of the weight force, which is do ...
299-112-1
... suggested by Leonardo da Vinci (1452–1519), who believed that the friction force is equal to the quarter of the normal load. In a clearer way it was proposed by Guillaume Amontons (1663– 1705) and later by Charles-Augustin de Coulomb (1736-1806) who formulated the laws of friction stating that the f ...
... suggested by Leonardo da Vinci (1452–1519), who believed that the friction force is equal to the quarter of the normal load. In a clearer way it was proposed by Guillaume Amontons (1663– 1705) and later by Charles-Augustin de Coulomb (1736-1806) who formulated the laws of friction stating that the f ...
Centre of Gravity, Stability, Friction File
... • How can I lose lots of weight quickly? (Effective but very expensive)! • Go to the moon! • Mass is the amount of matter (“stuff”) in an object measured in kg. Invariant for a given object. • Weight is the force caused by gravity acting on that mass. newtons. • W = mg. • g on earth taken as 9.8 N K ...
... • How can I lose lots of weight quickly? (Effective but very expensive)! • Go to the moon! • Mass is the amount of matter (“stuff”) in an object measured in kg. Invariant for a given object. • Weight is the force caused by gravity acting on that mass. newtons. • W = mg. • g on earth taken as 9.8 N K ...
AP Physics – Applying Forces
... The tension in the cable, T. And the force exerted by the wall on the beam, R. (The wall is pushing the beam up and out.) Think about this as an application of Newton’s Third Law. R must be acting in that way to counteract the Tension in the cable. (a) Let us first sum the torques. The pivot point i ...
... The tension in the cable, T. And the force exerted by the wall on the beam, R. (The wall is pushing the beam up and out.) Think about this as an application of Newton’s Third Law. R must be acting in that way to counteract the Tension in the cable. (a) Let us first sum the torques. The pivot point i ...
Friction
... If FA ·sin( + ) is not big enough to lift the box off the ramp, there is no acceleration in the perpendicular direction. So, FA ·sin( + ) + FN = m·g·cos. Remember, FN is what a scale would read if placed under the box, and a scale reads less if a force lifts up on the box. So, FN = m·g ·cos ...
... If FA ·sin( + ) is not big enough to lift the box off the ramp, there is no acceleration in the perpendicular direction. So, FA ·sin( + ) + FN = m·g·cos. Remember, FN is what a scale would read if placed under the box, and a scale reads less if a force lifts up on the box. So, FN = m·g ·cos ...
Mouse-Trap Car Worksheet
... If your vehicle does not have enough grip on the floor AND you have too much pulling force your wheels will spin-out! The more “grip” or traction your wheels have on the floor surface, the greater the acceleration that is possible for your vehicle. If you are making a speed-trap or a power pulling v ...
... If your vehicle does not have enough grip on the floor AND you have too much pulling force your wheels will spin-out! The more “grip” or traction your wheels have on the floor surface, the greater the acceleration that is possible for your vehicle. If you are making a speed-trap or a power pulling v ...
phys1443-spring11
... A one piece cylinder is shaped as in the figure with core section protruding from the larger drum. The cylinder is free to rotate around the central axis shown in the picture. A rope wrapped around the drum whose radius is R1 exerts force F1 to the right on the cylinder, and another force exerts F2 ...
... A one piece cylinder is shaped as in the figure with core section protruding from the larger drum. The cylinder is free to rotate around the central axis shown in the picture. A rope wrapped around the drum whose radius is R1 exerts force F1 to the right on the cylinder, and another force exerts F2 ...
File - Phy 2048-0002
... (a)Rolling at constant speed no sliding at P no friction. (b) Rolling with acceleration sliding at P friction force opposed to sliding. Static friction wheel does not slide smooth rolling motion aCOM = α R Sliding Increasing acceleration Example1: wheels of a car moving forward while i ...
... (a)Rolling at constant speed no sliding at P no friction. (b) Rolling with acceleration sliding at P friction force opposed to sliding. Static friction wheel does not slide smooth rolling motion aCOM = α R Sliding Increasing acceleration Example1: wheels of a car moving forward while i ...
Sliding Friction
... have already interlocked. If you try to get an object to start moving, you have to use a certain amount of force to break the objects out from their interlocked state. This usually results in a sudden jerk as movement starts. Once the objects are moving, static friction has been overcome and is no l ...
... have already interlocked. If you try to get an object to start moving, you have to use a certain amount of force to break the objects out from their interlocked state. This usually results in a sudden jerk as movement starts. Once the objects are moving, static friction has been overcome and is no l ...
2012-JJC-PH-H2-P2-Prelim
... point of application of each force. Your forces should be clearly labelled in words, describing the nature of each force. ...
... point of application of each force. Your forces should be clearly labelled in words, describing the nature of each force. ...
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.