Friction Test

Question 1
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Consider the given statements and select the correct option which correctly identifies true (T) and false (F).

(i) When a body is in steady motion on a surface, the force of friction is dynamic friction.

(ii) The force of friction between two bodies always acts parallel to the surface in contact with each other.

(iii) It is easier to push a lawn roller than to pull.

(iv) Limiting friction is greater than sliding friction.

A

(i) (ii) (iii) (iv)

T F T F

B

(i) (ii) (iii) (iv)

F T F T

C

(i) (ii) (iii) (iv)

T T T F

D

(i) (ii) (iii) (iv)

T T F T

Question 2
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A box was pushed equal distance on four different surfaces. The force needed for each surface was recorded in the given table.

Surface M N O P

Force Needed (N) 670 570 320 500

On which surface was the friction least?

A
M

B
N

C
O

D
P

Question 3
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Complete the passage using the suitable words given in option below.

A rough surface will offer a ___(i)___ frictional force than a smooth surface. The heavier the object, the ___(ii)___ will be the frictional force. Friction is a ___(iii)___ force.

A

(i) (ii) (iii)

Lower Greater Resistive

B

(i) (ii) (iii)

Greater Lower Contact

C

(i) (ii) (iii)

Greater Greater Contact

D

(i) (ii) (iii)

Lower Lower Resistive

Question 4
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Identify the methods of increasing and decreasing friction and choose the correct option.

(i) The tyres of vehicles have treads.

(ii) Gymnasts often apply a coarse material on their hands.

(iii) Saliva in our mouth helps us to swallow food.

(iv) A surgeon powders his hand before pulling on his plastic gloves

A

(i) (ii) (iii) (iv)

Increasing Decreasing Increasing Decreasing

B

(i) (ii) (iii) (iv)

Decreasing Increasing Decreasing Increasing

C

(i) (ii) (iii) (iv)

Increasing Increasing Decreasing Decreasing

D

(i) (ii) (iii) (iv)

Decreasing Decreasing Increasing Increasing

Question 5
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In which of the following cases the friction is helpful (H) and troublesome (T)?

(a) Lighting a matchstick

(b) Applying the brakes on a cycle

(c) Use a towel to open tightly closed lid of a bottle

(d) Pulling drawer out of a desk

A

(a) (b) (c) (d)

T T H H

B

(a) (b) (c) (d)

H H T T

C

(a) (b) (c) (d)

T T T H

D

(a) (b) (c) (d)

H H H T

Question 6
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Read the given statements and select the correct option.

Statement 1: It takes a much longer time and covers more distance to stop a moving ship in water than a moving car with same speed on the road.

Statement 2: The friction on water surface is much less than the solid surface.

A
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

B
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

C
Statement 1 is true but statement 2 is false.

D
Statement 1 is false but statement 2 is true.

Submit Test

Friction Test -...

Question 1

(i) (ii) (iii) (iv)

T F T F

(i) (ii) (iii) (iv)

F T F T

(i) (ii) (iii) (iv)

T T T F

(i) (ii) (iii) (iv)

T T F T

Question 2

M

N

O

P

Question 3

(i) (ii) (iii)

Lower Greater Resistive

(i) (ii) (iii)

Greater Lower Contact

(i) (ii) (iii)

Greater Greater Contact

(i) (ii) (iii)

Lower Lower Resistive

Question 4

(i) (ii) (iii) (iv)

Increasing Decreasing Increasing Decreasing

(i) (ii) (iii) (iv)

Decreasing Increasing Decreasing Increasing

(i) (ii) (iii) (iv)

Increasing Increasing Decreasing Decreasing

(i) (ii) (iii) (iv)

Decreasing Decreasing Increasing Increasing

Question 5

(a) (b) (c) (d)

T T H H

(a) (b) (c) (d)

H H T T

(a) (b) (c) (d)

T T T H

(a) (b) (c) (d)

H H H T

Question 6

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Statement 1 is true but statement 2 is false.

Statement 1 is false but statement 2 is true.

User

Question Analysis

Surface	M	N	O	P
Force Needed (N)	670	570	320	500

Friction Test -...

Question 1

(i) (ii) (iii) (iv) T F T F

(i) (ii) (iii) (iv) F T F T

(i) (ii) (iii) (iv) T T T F

(i) (ii) (iii) (iv) T T F T

Question 2

M

N

O

P

Question 3

(i) (ii) (iii) Lower Greater Resistive

(i) (ii) (iii) Greater Lower Contact

(i) (ii) (iii) Greater Greater Contact

(i) (ii) (iii) Lower Lower Resistive

Question 4

(i) (ii) (iii) (iv) Increasing Decreasing Increasing Decreasing

(i) (ii) (iii) (iv) Decreasing Increasing Decreasing Increasing

(i) (ii) (iii) (iv) Increasing Increasing Decreasing Decreasing

(i) (ii) (iii) (iv) Decreasing Decreasing Increasing Increasing

Question 5

(a) (b) (c) (d) T T H H

(a) (b) (c) (d) H H T T

(a) (b) (c) (d) T T T H

(a) (b) (c) (d) H H H T

Question 6

Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

Statement 1 is true but statement 2 is false.

Statement 1 is false but statement 2 is true.

User

Question Analysis

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(i) (ii) (iii) (iv)

T F T F

(i) (ii) (iii) (iv)

F T F T

(i) (ii) (iii) (iv)

T T T F

(i) (ii) (iii) (iv)

T T F T

(i) (ii) (iii)

Lower Greater Resistive

(i) (ii) (iii)

Greater Lower Contact

(i) (ii) (iii)

Greater Greater Contact

(i) (ii) (iii)

Lower Lower Resistive

(i) (ii) (iii) (iv)

Increasing Decreasing Increasing Decreasing

(i) (ii) (iii) (iv)

Decreasing Increasing Decreasing Increasing

(i) (ii) (iii) (iv)

Increasing Increasing Decreasing Decreasing

(i) (ii) (iii) (iv)

Decreasing Decreasing Increasing Increasing

(a) (b) (c) (d)

T T H H

(a) (b) (c) (d)

H H T T

(a) (b) (c) (d)

T T T H

(a) (b) (c) (d)

H H H T