Static Friction
Static Friction
The maximum frictional force present between any two objects when one object just tends to move or slip called static friction. Static friction is a kind of starting friction because an object just tends to start moving, it does not actually move. The object remains static (or stationary) in this case. We can demonstrate the static friction between a wooden block and a table top by performing an activity as follows : A wooden block (having a hook attached to its one side) is kept on the horizontal surface of a table. A spring balance is attached to the hook of wooden block (as shown in Figure 9). We pull the spring balance to the right side with a small force of our hand. This will exert a force on the wooden block. The wooden block, however, does not move because its motion is being opposed by the force of friction which acts in the opposite direction (to the left side). As we increase the pulling force applied to the wooden block (through spring balance), the friction also goes on increasing. But ultimately, when the applied force becomes a little more than the maximum frictional force, the wooden block just tends to move or slip on the surface of table. This means that the frictional force acting between the wooden block and table top has a maximum value beyond which it cannot increase. The force which we are exerting in making the wooden block just tend to move or slip is equal (but opposite) to the force of friction. In Figure 9 we can see that when the wooden block just tends to move or slip on the table top, the spring balance shows a reading of 5 N force (5 newtons force). This means that the magnitude of static friction between this wooden block and table top is of 5 newtons.
From the above discussion we conclude that the force required to overcome friction at the instant an object just tends to start moving from rest, is a measure of static friction. Static friction comes into play when we try to move a stationary object (which is at rest). Please note that in the case of static friction, the object is actually not moving or sliding over the other object, it only tends to move or slide.
A force of 5 N is required to move an object from rest. The value of static friction (f) is :
| |||
| Right Option : A | |||
| View Explanation | |||
The maximum frictional force present between any two objects when one object just tends to move called __________________ . | |||
| Right Option : A | |||
| View Explanation | |||
In which type of friction the object is not sliding or moving but actually tends to move or slide ? | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [10]
Abhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thMy experience with Abhyas academy is very good. I did not think that my every subject coming here will be so strong. The main thing is that the online tests had made me learn here more things.
Hiya Gupta
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
