Force and Pressure Test

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Force and Pressure Test - 13

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Weekly Quiz Competition

Question 1
1 / -0

A When does a body float on water?

A
When no force is acting on it.

B
When the net force acting on the body is zero

C
When there is a gravitational pull.

D
When there is friction between the body and the water

Solution

The weight of a body is balanced by the upthrust of water. Hence, the net force acting on a body is zero and so this helps the body float.
Question 2
1 / -0

In which of the following cases the net force is NOT equal to zero?

A
A kite held stationary in the sky.

B
A ball falling freely from a height.

C
A helicopter hovering above the ground.

D
A cork floating on the surface of water.

Solution

When a ball is falling freely from a height, the net force is not equal to zero.
Question 3
1 / -0

We use a straw (narrow pipe) to drink juice from a glass. What make this possible?

A
The volume of liquid

B
The atmospheric pressure

C
The gravitational pull

D
All of the above

Solution

When we suck air from pipe, atmospheric pressure pushes the liquid juice up to fill the vacuum and it comes up.
Question 4
1 / -0

Which of the following effects is NOT caused by the magnetic force between a magnet and a magnetic substance?

A
Change of state

B
Change of shape

C
Change of size

D
Change of chemical composition

Solution

A magnet attracts a magnetic material thereby making it move from rest. There may be a temporary change in the shape or size. But there is no change in the chemical composition.
Question 5
1 / -0

In cities, water from an overhead tank is supplied to houses using the principle of

(i) difference in pressure.

(ii) gravitational force.

(iii) decrease of friction m pipes.

A
Only (i)

B
Only (i) and (ii)

C
Only (ii) and (iii)

D
(i), (ii) and (iii)

Solution

The water at a height flows down due to pressure and gravitational force.
Question 6
1 / -0

A deep sea diver's ears get hurt when he is inside the water. What is the cause for it?

A
Lack of oxygen

B
Decrease in atmospheric pressure

C
Increase in water pressure

D
All of the above

Solution

Water pressure increases with an increase in the depth of the sea which effects the diver's ears.
Question 7
1 / -0

What does a barometer measure?

A
Liquid pressure

B
Thrust

C
Atmospheric pressure

D
Air temperature

Solution

The barometer is used to measure atmospheric pressure of a place.
Question 8
1 / -0

Four forces are acting on a body. If the body does not change its position or shape/then what does it mean?

A
Forces are similar acting in the same direction.

B
Forces are parallel and opposite.

C
Forces add up to zero when taken as vectors.

D
Forces are different acting in the same direction.

Solution

For a body to be in equilibrium or at rest, the vector sum of all forces must be zero.
Question 9
1 / -0

Why do deep sea divers use a special suit for diving?

A
To maintain their body temperature in cold sea water

B
To protect against sea animals

C
To counter balance the pressure in the sea.

D
To keep them dry

Solution

The suit (known as scuba suit) is pressurized to counter balance the heavy pressure in deep sea.
Question 10
1 / -0

On what factors does the magnitude of non-contact force depend?

A
Distance between two bodies

B
Mass of the two bodies

C
Chemical composition of the two bodies

D
All of the above

Solution

The magnitude of non-contact force depends on the distance between two bodies, mass and chemical composition of the two bodies.

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Re-Attempt Weekly Quiz Competition

Force and Pressure Test - 13

Result

Force and Pressure Test - 13

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SHARING IS CARING

Question 1

When no force is acting on it.

When the net force acting on the body is zero

When there is a gravitational pull.

When there is friction between the body and the water

Solution

Question 2

A kite held stationary in the sky.

A ball falling freely from a height.

A helicopter hovering above the ground.

A cork floating on the surface of water.

Solution

Question 3

The volume of liquid

The atmospheric pressure

The gravitational pull

All of the above

Solution

Question 4

Change of state

Change of shape

Change of size

Change of chemical composition

Solution

Question 5

Only (i)

Only (i) and (ii)

Only (ii) and (iii)

(i), (ii) and (iii)

Solution

Question 6

Lack of oxygen

Decrease in atmospheric pressure

Increase in water pressure

All of the above

Solution

Question 7

Liquid pressure

Thrust

Atmospheric pressure

Air temperature

Solution

Question 8

Forces are similar acting in the same direction.

Forces are parallel and opposite.

Forces add up to zero when taken as vectors.

Forces are different acting in the same direction.

Solution

Question 9

To maintain their body temperature in cold sea water

To protect against sea animals

To counter balance the pressure in the sea.

To keep them dry

Solution

Question 10

Distance between two bodies

Mass of the two bodies

Chemical composition of the two bodies

All of the above

Solution

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