Friction is desirable in some situations and undesirable in some other situations
(1) Mention two applications where friction is increased by making the surface rough
(1) Also mention the name of any two methods which is used to reduce friction whenever it
becomes undesirable
(b) A box is resting on the floor. To move it, forces of different magnitudes are applied as
shown in the figure
1N
3N
5N
Box is at rest.
Box is at rest.
Box just begins to slide
(1) What is the value of force of limiting friction actmg between floor and lower surface of the
box?
(11) Is this static or sliding friction?
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Answer:
In which standard are you studying?
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