Force and Pressure Test

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Force and Pressure Test - 5

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Weekly Quiz Competition

Question 1
1 / -0

Why does a rubber sucker stick to a surface?

A
It is the inherent property of rubber.

B
Gravitational force acts on it.

C
Elastic spring force acts on it.

D
Atmospheric pressure acts on it.

Solution

When a rubber sucker is pressed on any surface, most of the air between its cup and the surface escapes out. The sucker sticks to the surface because of the atmospheric pressure which acts on it.
Question 2
1 / -0

Which force does an archer use to pull a bow?

A
Muscular force

B
Magnetic force

C
Gravitational force

D
All of the above

Solution

An archer uses his strength (muscular force) to pull a bow.
Question 3
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A player slides a bowling ball on the lane to hit the pins. What is the effect of the force exerted on the bowling ball?

A
Stops the moving bowling ball

B
Changes the direction of the moving bowling ball

C
Changes the shape of the moving bowling ball

D
Changes the position of the stationary pins

Solution

When a bowling ball is made to slide by the exertion of force, there will be a change in the position of the stationary pins.
Question 4
1 / -0

Which of the following requires a pushing force?

A
Throwing a stone

B
Grabbing hold of a pencil

C
Leaves falling from a tree

D
A load lifted by a pulley

Solution

For throwing a stone, we need to apply a pushing force.
Question 5
1 / -0

Identify the application of low pressure in everyday life.

A
Wide tyres of a heavy vehicle

B
Cutting of an apple with a sharp knife

C
Hammering of a nail into wood

D
All of the above

Solution

Pressure = Thrust / Unit area.

If the area of the Unit area cross section is high, then low pressure is exerted due to thrust. In the case of wide tyres of a heavy vehicle, the pressure exerted by the tyres is less on the road.
Question 6
1 / -0

Which of the following does NOT require a force?

A
Rowing of a boat

B
Bursting of a balloon filled with lots of air.

C
Pedalling a cycle

D
Catching a moving cricket ball

Solution

Options (A), (C) and (D) are due to application of a force. Bursting of a balloon is due to expansion beyond the elastic limit of the balloon material.
Question 7
1 / -0

Which of the following statements about the moon is NOT correct?

A
The moon orbits the earth keeping the same side facing us.

B
The gravitational pull of the moon causes high tides in oceans.

C
The craters on the moon caused long ago still exist because the moon has no atmosphere.

D
The sun lights up the complete moon at any one time.

Solution

Statements (A), (B) and (C) are true. The sun lights up only half of the moon (not complete moon) at any one time. This is because moon is also a sphere like the sun.
Question 8
1 / -0

A book remains at rest on a table. Why?

A
No force acts on it.

B
There is friction between the book and the surface of the table.

C
Force exerted by the book on the table is the same as the force exerted by the table on the book.

D
All of the above

Solution

A book remains at rest on a table. Force exerted by the book on the table, is the same as the force exerted by the table on the book.
Question 9
1 / -0

How is the weight of an astronaut in the outer space in relation with his actual weight?

A
It is less than his actual weight.

B
It is more than his actual weight.

C
It is the same as his actual weight.

D
It is zero.

Solution

Since, weight is the result of gravitational force acting on an object, there is no gravitational force acting on the astronaut and so, the weight of an astronaut in outer space will be zero.
Question 10
1 / -0

Why is the atmospheric pressure not felt by us?

A
It is small in magnitude.

B
It acts only-on atmosphere and not on us.

C
Our internal body pressure is equal to that of the atmospheric pressure.

D
It does not act at sea level.

Solution

Our internal body pressure is equal to the atmospheric pressure. Hence, we do not feel the atmospheric pressure.
Question 11
1 / -0

A The speed of a falling body increases continuously. Why?

A
No force acts on the falling body.

B
The falling body is very light.

C
Air exerts a frictional force on the falling body.

D
The force acting on the body is in the direction of the fall.

Solution

The gravitational force for a falling body is along the direction of motion. Hence, its speed increases continuously till it touches the ground.

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Re-Attempt Weekly Quiz Competition

Force and Pressure Test - 5

Result

Force and Pressure Test - 5

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SHARING IS CARING

Question 1

It is the inherent property of rubber.

Gravitational force acts on it.

Elastic spring force acts on it.

Atmospheric pressure acts on it.

Solution

Question 2

Muscular force

Magnetic force

Gravitational force

All of the above

Solution

Question 3

Stops the moving bowling ball

Changes the direction of the moving bowling ball

Changes the shape of the moving bowling ball

Changes the position of the stationary pins

Solution

Question 4

Throwing a stone

Grabbing hold of a pencil

Leaves falling from a tree

A load lifted by a pulley

Solution

Question 5

Wide tyres of a heavy vehicle

Cutting of an apple with a sharp knife

Hammering of a nail into wood

All of the above

Solution

Question 6

Rowing of a boat

Bursting of a balloon filled with lots of air.

Pedalling a cycle

Catching a moving cricket ball

Solution

Question 7

The moon orbits the earth keeping the same side facing us.

The gravitational pull of the moon causes high tides in oceans.

The craters on the moon caused long ago still exist because the moon has no atmosphere.

The sun lights up the complete moon at any one time.

Solution

Question 8

No force acts on it.

There is friction between the book and the surface of the table.

Force exerted by the book on the table is the same as the force exerted by the table on the book.

All of the above

Solution

Question 9

It is less than his actual weight.

It is more than his actual weight.

It is the same as his actual weight.

It is zero.

Solution

Question 10

It is small in magnitude.

It acts only-on atmosphere and not on us.

Our internal body pressure is equal to that of the atmospheric pressure.

It does not act at sea level.

Solution

Question 11

No force acts on the falling body.

The falling body is very light.

Air exerts a frictional force on the falling body.

The force acting on the body is in the direction of the fall.

Solution

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