Identify the incorrect statement from the following.
Friction opposes the relative motion.
Friction depends on the volume of body.
Friction does not depend on the area in contact.
Rolling friction is smaller than sliding friction.
Get Answer
Friction does not depend on volume of body
The coefficient of static friction between two surfaces depends upon
the normal reaction
the shape of the surface in contact
the magnitude of applied force
None of these
Coefficient of static friction
Therefore, coefficient of static friction depends upon the normal reaction.
If the applied force is doubled, then coefficient of friction is
halved
tripled
doubled
not changed
Coefficient of friction is independent of applied force.
When a box is in stationary position with respect to train moving with acceleration, then relative motion is opposed by the ...X.... Which provides the same acceleration to the box as that of the train, keeping it stationary relative to the train. Here, refers to
kinetic friction
static friction
limiting friction
When a box is in stationary position with respect to train moving with acceleration, then relative motion is opposed by the static friction.
If and are coefficients of static friction, kinetic friction and rolling friction, then
It is difficult to move a cycle with brakes on because
rolling friction opposes motion on road
sliding friction opposes motion on road
rolling friction is more than sliding friction
sliding friction is more than rolling friction
When brakes are on, the wheels of the cycle will slide on the road instead of rolling there. It means the sliding friction will come into play instead of rolling friction. The value of sliding friction is more than that of rolling friction.
Which of the following statements about friction is true?
Friction can be reduced to zero.
Frictional force cannot accelerate a body.
Frictional force is proportional to the area of contact between the two surfaces.
Kinetic friction is always greater than rolling friction.
The force required to just move a body up the inclined plane is double the force required to just prevent the body from sliding down the plane. The coefficient of friction is . The inclination of the plane is
or
A conveyor belt is moving at a constant speed of . A box is gently dropped on it. The coefficient of friction between them is . The distance that the box will move relative to belt before coming to rest on it taking , is
zero
Frictional force on the box
Acceleration in the box
w.r.t. belt
distance
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