EASY

Earn 100

Give one condition necessary for a fictional force to act.

Important Questions on Friction

MEDIUM

Science>Physics>Friction>Factors Affecting Friction

Explain why, sliding friction is less than static friction.

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

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 _____.

MEDIUM

Science>Physics>Friction>Factors Affecting Friction

Why does a man slip when he steps on a banana peel thrown on the road?

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?

EASY

Science>Physics>Friction>Factors Affecting Friction

The friction between two surfaces does not depend on one of the following. This one is:

EASY

Science>Physics>Friction>Factors Affecting Friction

Why is it difficult to light a matchstick by striking it on a smooth surface?

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.

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

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:

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?

MEDIUM

Science>Physics>Friction>Factors Affecting Friction

Explain why, it is easier to drag a mat on floor when nobody is sitting on it but much more difficult to drag the same mat when a person is sitting on it.

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:

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

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

If the static friction between two surfaces X and Y is found to be