examples of frictional force
Answers
Answer:
Driving
While driving vehicles and riding bicycles, friction occurs between the wheels of the vehicle and the surface over which the vehicle is traversing. The coefficient of friction determines the “stickiness” between two objects. If the friction is zero, the vehicle would fail to move forward. It is only because of friction that we are able to stop our vehicle.
Writing
All of us write using either a pen or a pencil in our daily life. What happens when you hold your pen or pencil? Have you ever tried giving a thought about it? In case you are wondering, the answer to your question lies in the phenomenon of friction. It is the friction which enables us to write. The frictional force is created when the tip of a pen or pencil is brought in contact with the surface of the paper. In the case of writing with a ball-point pen, some sort of adhesive forces is acting between the ball and ink. When you start writing with a ball-point pen on paper, the ball starts rolling and the ink is deposited on the surface of the paper. The rolling of the ball invites rolling friction to come into play. Whereas, while writing with a pencil, sliding friction comes into action; and deposits lead on paper.
A similar concept is applicable when using an eraser. You apply some force on the eraser which helps in wiping off the desired content.
4. Rubbing of Hands for Warmth
Writing
It is a friction that opposes sloping and help us to hold pen. Also there is friction between our pen and paper which prevent the pen from sloping on the paper.