Friction Test

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Friction Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Sudhakar's bicycle was making a lot of squeaking noise. What should he do to stop the squeaking noise?

A
Water

B
Oil

C
Sand

D
Powder

Solution

Sound is produced due to increased frictional force between the two surfaces. Oil is used as a lubricant to reduce frictional force in machines.
Question 2
1 / -0

A coin flicked on a table will stop. Why?

A
It is heavy.

B
No force is acting on it.

C
The earth attracts the coin.

D
The table exerts a frictional force.

Solution

The coin will stop because of friction exerted by the surface of the table on the coin.
Question 3
1 / -0

While walking on ice/why should one take small steps to avoid slipping?

A
Smaller steps ensure larger friction.

B
Smaller steps ensure smaller friction.

C
Smaller steps ensure larger distance covered.

D
Smaller steps ensure smaller distance covered.
Question 4
1 / -0

In which of the following activities is friction useful?

A
Driving a car

B
Sitting on a chair

C
Rowing a boat

D
All of the above

Solution

It will be difficult to sit on a chair without friction. In the other two cases too, friction is useful.
Question 5
1 / -0

How can friction be decreased?

A
By using smooth surfaces

B
By using dry surfaces

C
By increasing the weight of the body

D
All of the above

Solution

Friction can be decreased by making the surfaces smooth.
Question 6
1 / -0

Which of the following is a measure of the force required to keep an object moving with the same speed?

A
Static friction

B
Sliding friction

C
Limiting friction

D
All of the above

Solution

Sliding friction is required to keep the object moving with the same speed. Once the applied force overcomes the static friction, the object starts moving.
Question 7
1 / -0

Which of the following activities will not be possible in the absence of friction?

A
Holding a glass

B
Writing on a paper

C
Sitting on a chair

D
All of the above

Solution

Holding a glass, writing on a paper and sitting on a chair are the activities which are not possible without friction.
Question 8
1 / -0

Which of the following activities will produce the least amount of frictional force?

A
Walking

B
Running

C
Ice-skating

D
Rowing a boat

Solution

Ice offers the least friction as compared to water and road surfaces.
Question 9
1 / -0

Which of the following is reduced by the correct measure of air pressure in the tyres?

A
Static friction

B
Sliding friction

C
Rolling friction

D
All of the above

Solution

The correct measure of air pressure in the tyres provides an air cushion to reduce rolling friction.
Question 10
1 / -0

Which of the following makes it difficult to quickly stop a ship moving in a sea by applying brakes?

A
Low friction

B
Excess friction

C
High speed

D
External force

Solution

Friction exerted by water is much less than that exerted by a solid. Hence, it takes more time to stop a ship in water.

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Re-Attempt Weekly Quiz Competition

Friction Test - 5

Result

Friction Test - 5

Score

-

Rank

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SHARING IS CARING

Question 1

Water

Oil

Sand

Powder

Solution

Question 2

It is heavy.

No force is acting on it.

The earth attracts the coin.

The table exerts a frictional force.

Solution

Question 3

Smaller steps ensure larger friction.

Smaller steps ensure smaller friction.

Smaller steps ensure larger distance covered.

Smaller steps ensure smaller distance covered.

Question 4

Driving a car

Sitting on a chair

Rowing a boat

All of the above

Solution

Question 5

By using smooth surfaces

By using dry surfaces

By increasing the weight of the body

All of the above

Solution

Question 6

Static friction

Sliding friction

Limiting friction

All of the above

Solution

Question 7

Holding a glass

Writing on a paper

Sitting on a chair

All of the above

Solution

Question 8

Walking

Running

Ice-skating

Rowing a boat

Solution

Question 9

Static friction

Sliding friction

Rolling friction

All of the above

Solution

Question 10

Low friction

Excess friction

High speed

External force

Solution

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