Measurements Set up a track as shown below Record the length of the track and masses of the various blocks. There is a limit to the force that static friction can successfully oppose.
If the opposing tangential forces exceed it, motion results. In fact, the two components are often discussed as if they are two separate forces. The direction of the frictional force is opposite to the direction of motion the object would have in the absence of friction.
Friction behaves slightly differently depending on whether or not the object is moving relative to the surface. The expression ms N is the largest the static friction can be.
One is then left with the frictional force being proportional to the force exterted perpendicular to the surface, that is, the normal force. When that limit is exceeded, motion results. PYL Friction When an object lies on or moves along a surface, there is a contact force.
It is convenient to break that contact force into two components: The strength magnitude of the frictional force might depend on the following: The force normal to the surface is called the normal force.
Of course, as we saw previously in the force lab sit makes no difference to its effect whether it is two forces or one force addition of vectors.
Any material dependence from the third consideration will be encoded in the proportionality constant called the coefficient of friction. The normal force prevents the object from breaking through the surface.
To keep consistent with this approximation, we assume that the area dependences of the first two considerations above exactly cancel. If the object is moving has a non-zero velocity relative to the surface, then friction opposes that motion, i. If an object is not moving relative to the surface, then the friction opposes any would-be motion, i.
Its magnitude exactly balances all other forces in the normal perpendicular to the surface direction.Experiment 5 ~ Friction Purpose: In this lab, you will make some basic measurements of friction. First you will measure the coefficients of static friction between several combinations of surfaces using a heavy block and a set of hanging masses.
The Force of Friction We will be completing a formal lab report on the force of friction You will record a rough draft of the investigation in your science notebook Your final draft must be typed, double spaced, and.
50N Force Probe. Figure 1- Block on incline plane. 2. Calibrate the force probe by using the Experiment 6 The Coefficient of Friction speed. You should have to tap the block to get it started in section 11 of the lab?
4. Why can anti-lock brakes stop a car in a shorter distance than regular brakes? Friction Lab Friction is a force that occurs when two surfaces TOUCH. In this lab you will investigate the factors that affect Part C: Affects of Surface Area Contact on Friction 1.) Place the bare wood block with the attached spring scale flat on the wood strip.
2.) Place two books on the top of the block. Jul 27, · W * Constant variable: Material (Wood) and Area ( W.7 1 (b) Friction Force and Coefficient of Friction as a function of Weight b (i) Graph of Friction Forcem2) Weight/4(10).
Friction, Experiment and Theory The lab this week investigates the frictional force and the physical interpretation of normal force and the frictional force while the block is sliding across the board. area and velocity upon the coefficient of friction of wood-on-wood. Discuss your results.Download