Force and Pressure Test

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Force and Pressure Test - 18

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Weekly Quiz Competition

Question 1
1 / -0

A force is applied to an object in the direction of its motion. The speed of object will .......... .

A
increase

B
decrease

C
can't say

D
remain unchanged

Solution

Acceleration $$\vec{a} = \dfrac{\vec{F}}{m}$$
This implies that the object accelerates in the same direction as that of force, hence the speed of the object will increase after applying a force in the direction of its motion.
Question 2
1 / -0

Which of the following example describes change of shape by applying force?

A
Kicking a ball to move faster.

B
Switching on a fan to rotate.

C
Jumping from a height.

D
Tearing a paper into two pieces.

Solution

Kicking a ball to move faster or jumping from a height and switching on a fan to rotate change the linear velocity of the ball and angular velocity of the fan respectively whereas tearing a paper into pieces changes the shape of the paper. Thus tearing action describes the change of shape by applying force.
Question 3
1 / -0

Which of the following is NOT attributable to application of force?

A
rowing of a boat

B
bursting of a balloon while blowing

C
pedaling a cycle

D
catching a moving cricket ball

Solution

In all other options two objects are in contact with each other so a force is being applied but the balloon bursts because of its excessive expansion beyond its elastic limit, thus bursting a balloon while blowing is not attributable to application of force .
Question 4
1 / -0

Which of these is not a contact force?

A
Friction

B
Muscular force

C
Magnetic force

D
None of these
Solution
Answer is C.

Contact forces:
They are such forces which are exerted on objects by direct contact. The forces which acts on bodies when they are in actual contact are called the contact forces.
The following forces come under Contact Forces.
- Frictional forces
- Normal reaction force
- Tension force as applied through strings
- Force exerted by a spring
- Force exerted during collision
- Force exerted by a spring
- Force exerted during collision
- Force applied as a pull or push
Non Contact Force:
The forces which act on bodies without being physically touched, are called the non-contact forces.
The following forces come under non-contact forces :
- Gravitational Force
- Electrostatic Force
- Magnetic Force
Hence, the odd man out is magnetic force.
Question 5
1 / -0

A force cannot be seen but the effect of force can be felt.

A
True

B
False

C
Ambiguous

D
Data insufficient

Solution

A force is a push or pull upon an object resulting from the object's interaction with another object. A force is not a physical object that can be seen. However, the effect of a force on an object can be seen (i.e. change in its speed, direction of motion, shape and size, etc.)
Question 6
1 / -0

A force is a result of:

A
interaction between two bodies

B
interaction of one body with itself

C
friction

D
all of the above

Solution

One object exerts a force on the other object due to their mutual interaction when the objects either are in contact with each other or placed at certain distance apart.
Hence a force is a result of interaction between two bodies.
Question 7
1 / -0

Which of the following property of a substance cannot be changed by application of force?

A
Shape

B
Size

C
Elasticity

D
Reactivity with water

Solution

The application of force only changes the physical state of the substance but not the chemical state (properties). As reactivity of substance with water is a chemical property, thus it will not be affected due to the application of force.
Question 8
1 / -0

Which of the following class of forces is different from others?

A
Pulling of a cart

B
Stretching of a coiled spring

C
Kicking of a football

D
Weight of the body

Solution

Pulling of a cart, stretching of a coiled spring and kicking of a ball take place due to contact forces but weight of the body (gravitational force) is a non-contact force.

Hence option $$D$$ is correct.
Question 9
1 / -0

The action of a force on an object imparts:

A
motion.

B
change in shape.

C
change in size.

D
all of these

Solution

The action of a force on an objects can result in:
1. Movement of an object.
2. Change in size of an object.
3. Change in shape of an object.
Question 10
1 / -0

Fill in the blanks:
A push or a pull on an object are types of ________.

A
pressure

B
attraction

C
repulsion

D
force

Solution

Force is required to move a stationary object, to stop a moving object, etc. The phenomenon required to push or to pull on object is force.

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Re-Attempt Weekly Quiz Competition

Force and Pressure Test - 18

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Force and Pressure Test - 18

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SHARING IS CARING

Question 1

increase

decrease

can't say

remain unchanged

Solution

Question 2

Kicking a ball to move faster.

Switching on a fan to rotate.

Jumping from a height.

Tearing a paper into two pieces.

Solution

Question 3

rowing of a boat

bursting of a balloon while blowing

pedaling a cycle

catching a moving cricket ball

Solution

Question 4

Friction

Muscular force

Magnetic force

None of these

Solution

Question 5

True

False

Ambiguous

Data insufficient

Solution

Question 6

interaction between two bodies

interaction of one body with itself

friction

all of the above

Solution

Question 7

Shape

Size

Elasticity

Reactivity with water

Solution

Question 8

Pulling of a cart

Stretching of a coiled spring

Kicking of a football

Weight of the body

Solution

Question 9

motion.

change in shape.

change in size.

all of these

Solution

Question 10

pressure

attraction

repulsion

force

Solution

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