MEDIUM
Earn 100

Friction is independent of area of contact.

50% studentsanswered this correctly

Important Questions on Friction

HARD
Science>Physics>Friction>Factors affecting Friction
Put a uniform meter scale horizontally on your extended index fingers with the left one at 0.00 cm and the right one at 90.00 cm. When you attempt to move both the fingers slowly towards the center, initially only the left finger slips with respect to the scale and the right finger does not. After some distance, the left finger stops and the right one starts slipping. Then the right finger stops at a distance xR from the center (50.00 cm) of the scale and the left one starts slipping again. This happens because of the difference in the frictional forces on the two fingers. If the coefficients of static and dynamic friction between the fingers and the scale are 0.40 and 0.32, respectively, the value of xR (in cm) is___________.
MEDIUM
Science>Physics>Friction>Factors affecting Friction
When a pencil cell is released from a certain point on an inclined wooden board, it travels a distance of 35 cm on floor A before it comes to rest. When the same pencil cell is released from the same point on the same inclined board, it travels a distance of 20 cm on floor B before coming to rest. Which floor, A or B, offers greater friction? Give reason for your answer.
MEDIUM
Science>Physics>Friction>Factors affecting Friction
Iqbal has to push a lighter box and Seema has to push a similar heavier box on the same floor. Who will have to apply a larger force and why?
EASY
Science>Physics>Friction>Factors affecting Friction
If the static friction between two surfaces X and Y is found to be 20 N, then the rolling friction between these two surfaces should most likely be:
MEDIUM
Science>Physics>Friction>Factors affecting Friction
Which will cause more friction: a rough surface or a smooth surface? Why?
MEDIUM
Science>Physics>Friction>Factors affecting Friction
Give examples to show that friction depends on the nature of two surfaces in contact.
 
MEDIUM
Science>Physics>Friction>Factors affecting Friction
Explain why, sliding friction is less than static friction.
MEDIUM
Science>Physics>Friction>Factors affecting Friction
You spill a bucket of soapy water on a marble floor accidentally. Would it make easier or more difficult for you to walk on the floor? Why?
EASY
Science>Physics>Friction>Factors affecting Friction
A book is lying on the horizontal tabletop. If we tilt the table a little, then the book starts sliding down slowly. This happens because _____.
EASY
Science>Physics>Friction>Factors affecting Friction
If the sliding friction between two surfaces is found to be 8 N, then the static friction between these two surfaces is most likely to be:
EASY
Science>Physics>Friction>Factors affecting Friction
If the static friction between two surfaces P and Q is measured to be 50 N, then the sliding friction between these two surfaces is most likely to be:
EASY
Science>Physics>Friction>Factors affecting Friction
Which type of surfaces produce least friction?
 
EASY
Science>Physics>Friction>Factors affecting Friction
The friction between two surfaces does not depend on one of the following. This one is:
MEDIUM
Science>Physics>Friction>Factors affecting Friction
Why does a man slip when he steps on a banana peel thrown on the road?
EASY
Science>Physics>Friction>Factors affecting Friction
Which of the following will produce the maximum friction?
MEDIUM
Science>Physics>Friction>Factors affecting Friction
What is the difference between static friction and sliding friction? For a given pair of objects, which of the two is greater?
 
HARD
Science>Physics>Friction>Factors affecting Friction
Four children were asked to arrange forces due to rolling, static and sliding frictions in a decreasing order. The correct arrangement is:
EASY
Science>Physics>Friction>Factors affecting Friction
Cotyledons are also called-
MEDIUM
Science>Physics>Friction>Factors affecting Friction

What kind of friction comes into play:

When a block of wood kept on table moves slowly?

EASY
Science>Physics>Friction>Factors affecting Friction
A boy runs his toy car on dry marble floor, wet marble floor, newspaper and towel spread on the floor. The force of friction acting on the car on different surfaces in increasing order will be: