Home
Class 11
PHYSICS
Explain why it is difficult to write on...

Explain why it is difficult to write on a paper surface that is too smooth or too rough.

Text Solution

Verified by Experts

A force of friction acts at the point contact of the pen and the paper against the motion of the pen. For a very smooth paper frictional force is low and the pen slips on the paper surface. For a very rough paper frictional force is quite high and this makes it difficult to move the pen over the paper. Thus these surfaces are not suitable for writing.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • FRICTION

    CHHAYA PUBLICATION|Exercise EXERCISE (Multiple Choice Questions )|10 Videos

  • FRICTION

    CHHAYA PUBLICATION|Exercise EXERCISE (Based on Motion on inclined Surface )|7 Videos

  • FRICTION

    CHHAYA PUBLICATION|Exercise Section Related Questions|9 Videos

  • FIRST AND SECOND LAW OF THERMODYNAMICS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|18 Videos

  • HYDROSTATICS

    CHHAYA PUBLICATION|Exercise CBSE SCANNER|1 Videos

Similar Questions

Explore conceptually related problems

Explain why it is difficult to open a door by pushing or pulling it near the hinge.

Explain why it is very difficult to introduce the third -NO_2 group into the benzene ring.

Explain why in the extraction of Al the surface of the fused matrix is covered with powdered coke.

Force of friction is greater in case of rough surface or smooth surface?

Explain why, for any charge configuration the equipotential surface through a point is normal to the electric field at that point. Draw a sketch of equipotential surfaces due to a single charge (-q), depicting the electric field lines due to the charge.

State whether True or False Force of friction is greater in case of smooth surface than rough one.

Explain why-(a) A green layeris formed on the surface of copper which is left exposed in moist air for a long period. (b) blue colour of the copper sulphate solution is discharged slowly when an iron rod is dipped in it. (c) Galvanised irono is not used as a fondstuff container.

Explain why melting and boiling point point of Boron is too high. Stall two 'P' block element which has diagonal relationship. Why BF_3 acts as lewis acid?

Explain why the coolant in a chemical or a nuclear plant (i.e., the liquid used to prevent the different parts of a plant from getting too hot) should have high specific heat.

To make a piece of paper float horizontally in air, we allow air to flow over the upper surface of the paper, but not below its lower surface. Why?

Home
Profile