The picture shows four types of shoe soles.
Which shoe sole provides the best grip and friction while walking?
Important Questions on Force and Machine
Write a short note on term ‘groove’.
Choose the correct answer from the bracket and fill in the blank.
_____ (Oiling/ Rubbing) reduces friction between parts of a machine.
Write in brief, how does a bicycle stop when its brakes are applied.
In which ways friction between the two surfaces can be minimized?
Oiling of the axles of a bicycle make the bicycle moving easily. Comment along with the reason.
Give the name of material which reduces the force of friction.
State the reason for sprinkling of fine powders on the carrom board.
We always apply powder to a carrom board. Why?
Write the condition under which the rolling friction increases.
Ball bearings are used in machineries. Explain the reason.
Name two methods of increasing friction.
