Friction Test

Result

Friction Test - 20

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Weekly Quiz Competition

Question 1
1 / -0

To move at the same speed, a car with a flat face and another with a streamlined body will require different amounts of force from the engine. The engine of the streamline bodied car will:

A
Exert less force

B
Exert more force

C
Exert zero force

D
None of these

Solution

A car with streamlined body suffers less air friction while moving. And the car with a flat face will suffer higher air friction. As a result, the car with streamlined body will require less force from the engine to maintain the same speed.
Question 2
1 / -0

________________ is a force that resists the movement of a solid object through a fluid.

A
Thrust

B
Magnetic force

C
Fluid friction

D
None of these

Solution

By definition, fluid friction is a force that resists the movement of a solid object through a fluid.
Question 3
1 / -0

In absence of friction

A
our shoes will remain intact

B
we will not be able to walk

C
we will be able to slide smoothly

D
all the above will happen

Solution

Friction force always opposes relative motion between contact surfaces.
which results, we see wear and tear in machine parts or shoes.
But in absence of it, we will not be able to walk, our shoes will remain intact and we will be able to slide smoothly.
Hence Option D.
Question 4
1 / -0

Is friction necessary to walk on the moon?

A
Yes

B
No

C
May be

D
Ambiguous

Solution

Friction is necessary to walk on the moon. If there is no friction, the foot will slip and we will not be able to move forward.
Moon has 6 times less gravity than earth. So, friction will be less. But, without friction, walking is not possible even on moon.
Question 5
1 / -0

Which of the following best describe friction ?

A
can occur only between two surfaces that are moving relative to one another.

B
is equal to the normal force divided by the magnitude of friction.

C
opposes the relative motion between two surfaces in contact

D
only depends on one of the surfaces in contact.

E
is not equal to the applied force.

Solution

Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
The force adjusts its magnitude to balance the applied force upto a limiting value.
Question 6
1 / -0

Fill in the blank.
Water offers _______ fluid friction as compared to honey.

A
higher

B
lower

C
same

D
zero

Solution

Water, having less density than honey, offers lower fluid friction as compared to honey.
Question 7
1 / -0

Hailstones falling from atmosphere relates to:

A
Static friction

B
Rolling friction

C
Sliding friction

D
Fluid friction

Solution

Hailstones falling from the atmosphere is related to Fluid friction. Fluid friction occurs when there is the resistance between particles in fluids or in gases.
Question 8
1 / -0

Fill in the blank.
Fluid Friction is ______ the sliding friction of solids.

A
higher than

B
lower than

C
same as

D
higher than or equal to

Solution

Fluid Friction is lower than sliding friction of solids. When the friction between two surfaces in contact has to be reduced, a fluid(lubricant) is used.
Question 9
1 / -0

The deeper we go inside a flowing river, fluid friction:

A
Decreases

B
Increases

C
Remains same

D
Becomes zero

Solution

Fluid friction increases with the depth of a flowing liquid because as the depth increases the density of the water also increases. More density provides more friction.
Question 10
1 / -0

The mover pushed his cart on tile floor and it went fast and easy. When he pushed his cart on carpet it was harder because there is more friction on carpet. What should he do to move his cart on carpet with equal speed?

A
He should exert same force

B
He should exert less force

C
He should exert more force

D
None of the above

Solution

Carpet has a rough surface as compared to the tile floor, because of this friction is higher on the carpet as compared to the tile floor. As we know that friction is opposing force so the mover should increase the force to push the cart, when he is on carpet at the same speed.

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Re-Attempt Weekly Quiz Competition

Friction Test - 20

Result

Friction Test - 20

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SHARING IS CARING

Question 1

Exert less force

Exert more force

Exert zero force

None of these

Solution

Question 2

Thrust

Magnetic force

Fluid friction

None of these

Solution

Question 3

our shoes will remain intact

we will not be able to walk

we will be able to slide smoothly

all the above will happen

Solution

Question 4

Yes

No

May be

Ambiguous

Solution

Question 5

can occur only between two surfaces that are moving relative to one another.

is equal to the normal force divided by the magnitude of friction.

opposes the relative motion between two surfaces in contact

only depends on one of the surfaces in contact.

is not equal to the applied force.

Solution

Question 6

higher

lower

same

zero

Solution

Question 7

Static friction

Rolling friction

Sliding friction

Fluid friction

Solution

Question 8

higher than

lower than

same as

higher than or equal to

Solution

Question 9

Decreases

Increases

Remains same

Becomes zero

Solution

Question 10

He should exert same force

He should exert less force

He should exert more force

None of the above

Solution

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