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Worksheetsfriction
Total questions: 15
Worksheet time: 8mins
Friction is a
non-contact force
contact force
magnetic force
electrostatic force
Which of the following produces least friction?
Sliding friction
Rolling friction
Composite friction
Static friction
Friction always
opposes the motion
helps the motion
both (a) and (b)
none of these
Friction can be reduced by using
oil
grease
powder
all of these
Static friction is less than
sliding friction
rolling friction
both (a) and (b)
none of these
Whenever the surfaces in contact tend to move or move with respect to each other, the force of friction comes into play
only if the objects are solid.
only if one of the two objects is liquid.
only if one of the two objects is gaseous.
irrespective of whether the objects are solid, liquid or gaseous
To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?
Stone
Plastic block
Wooden block
Glass block
The shape of an aeroplane is like a
streamline
turbulent
both a , b
none of these
Friction is
foe
friend
both (a) and (b)
none of these
Friction due to fluids is called
force
pressure
friction
Drag
Which of the following is not a smooth surface?
Surface of wet soap
Surface of tyres
Glazed tiles
Surface of mirror
A toy car released with the same initial speed will travel farthest on
muddy surface
polished marble surface
cemented surface
brick surface
If we apply oil on door hinges, the friction will
increase
decrease
disappear altogether
will remain unchanged
Force of friction depends on
roughness of surface
smoothness of surface
inclination of surface
all of these
Fluids are
liquids
gases
both (a) and (b)
none of these
