Force and Pressure Test

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Force and Pressure Test - 36

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Weekly Quiz Competition

Question 1
1 / -0

The bags and suitcases are provided with broad handles so that the __________ exerted on the hand while carrying them is minimum.

A
pressure

B
thrust

C
force

D
friction

Solution

Increasing the area of the handle makes sure that the pressure exerted by it on the hand will be minimum. Thats why, the handles of bags and suitcases are made broad.
Question 2
1 / -0

It is difficult to walk bare feet on a sandy ground as the sand :

A
is coarse, rough and irritating and gets everywhere

B
flies away

C
has crabs hiding in them

D
yields under our weight

Solution

When we walk barefoot on the sand, the sand yields under our weight. When we push off some of the ground that were meant to support ourselves, gets pushed away rather than staying in place. So, we do not get proper normal reaction i.e. friction force that helps us to walk. [Option D]
Question 3
1 / -0

The gravitational force is a:

A
Contact force

B
Action at a distance force

C
Non-contact force

D
Both $$B$$ and $$C$$

Solution

$$\textbf{Correct option: Option (D).}$$

$$\textbf{Explanation:}$$
$$\bullet$$Gravitational force is a universal force of attraction between matters due to the virtue of their masses.

$$\bullet$$It acts all the time on all the matters. It is a non-contact force and acts from distance and therefore its formula is given by,

$$F=\dfrac{GMm}{{{R}^{2}}}$$

$$\textbf{Thus, option (B) and (C) both are correct and hence option (D) is correct.}$$
Question 4
1 / -0

In the picture shown below, the man is

A
Applying no force on the stool

B
Applying pressure on the stool

C
Applying force on the stool

D
Both $$(B)$$ & $$(C)$$

Solution

Answer is D.

Force applied by the man on the stool is his weight.
Pressure is defined as the normal force per unit area of a surface. If F is the force acting normal to the surface area A, then the pressure P is given by,
P = F/A, Newtons/square meter or P = F/A Pascals.
Hence, the man sitting on the stool is applying both pressure and force on the stool.
Question 5
1 / -0

Force can only increase or decrease the speed of a moving object or change its direction.

A
True

B
False

C
Both

D
None

Solution

If the force applied to the object is in the direction of its motion, the speed of the object increases. If the force is applied in the direction opposite to the direction of motion, then it results in a decrease in the speed of the object.
Question 6
1 / -0

In a simple pendulum, when the bob is in rest in the central position, the forces are

A
balanced

B
unbalanced

C
sometimes balanced and sometimes unbalanced

D
none of these

Solution

F.B.D of Bob
$$T=mg$$
Force is balanced.
Question 7
1 / -0

The weight of a man is $$750$$ N. The total area of the soles of his shoes is $$250$$ $$ \displaystyle cm^{2} $$. Find the pressure he applies on the floor

A
$$30000 Pa$$

B
$$150 Pa$$

C
$$300 Pa$$

D
$$3\times10^{6} Pa$$

Solution

Force$$(F)= 750\ N$$
Area$$(A)= 250\ { cm }^{ 2 }$$
$$\Rightarrow A = 250\times { 10 }^{ -4 }\ { m }^{ 2 }$$

$$\text{Pressure}=\dfrac { \text{Force} }{ \text{Area} }$$

$$\Rightarrow P =\dfrac { 750 }{ 250 } \times { 10 }^{ 4 }\dfrac { N }{ { m }^{ 2 } } $$

$$\Rightarrow P = 30000\ Pa$$
Question 8
1 / -0

When the eraser presses on a paper with a force of $$1$$ N the paper experiences a pressure of $$10,000$$ Pa. Find the area of contact between the eraser and the paper.

A
$$ \displaystyle 1 cm^{3} $$

B
$$ \displaystyle 10 cm^{2} $$

C
$$ \displaystyle 1 cm^{6} $$

D
$$ \displaystyle 1 cm^{2} $$

Solution

Force = 1N
Pressure = 10000 Pa
Since Pressure = $$\dfrac { Force }{ Area } $$
Area = $$\dfrac { Force }{ Pressure } =\dfrac { 1 }{ 10000 } { m }^{ 2 }$$
= $${ 10 }^{ -4 }{ m }^{ 2 }$$
Area = 1 $${ cm }^{ 2 }$$
Question 9
1 / -0

What will be the net force acting on an object when two equal forces are applied on an object in opposite directions?

A
Sum of the forces.

B
Zero

C
Equal to each of the applied forces.

D
Difference of the forces.

Solution

The forces acting on the object in the opposite directions are equal. The net force will be the difference of the two equal forces. Since both the forces are equal, net force is zero.
Question 10
1 / -0

When a force is exerted on an object without any contact, the force is known as _______.

A
Contact force

B
Non-contact force

C
Muscular force

D
None of these

Solution

A force applied on an object without any contact is known as non-contact force, For example, an apple falling from a tree.

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Re-Attempt Weekly Quiz Competition

Force and Pressure Test - 36

Result

Force and Pressure Test - 36

Score

-

Rank

-

SHARING IS CARING

Question 1

pressure

thrust

force

friction

Solution

Question 2

is coarse, rough and irritating and gets everywhere

flies away

has crabs hiding in them

yields under our weight

Solution

Question 3

Contact force

Action at a distance force

Non-contact force

Both $$B$$ and $$C$$

Solution

Question 4

Applying no force on the stool

Applying pressure on the stool

Applying force on the stool

Both $$(B)$$ & $$(C)$$

Solution

Question 5

True

False

Both

None

Solution

Question 6

balanced

unbalanced

sometimes balanced and sometimes unbalanced

none of these

Solution

Question 7

$$30000 Pa$$

$$150 Pa$$

$$300 Pa$$

$$3\times10^{6} Pa$$

Solution

Question 8

$$ \displaystyle 1 cm^{3} $$

$$ \displaystyle 10 cm^{2} $$

$$ \displaystyle 1 cm^{6} $$

$$ \displaystyle 1 cm^{2} $$

Solution

Question 9

Sum of the forces.

Zero

Equal to each of the applied forces.

Difference of the forces.

Solution

Question 10

Contact force

Non-contact force

Muscular force

None of these

Solution

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