Motion Test

Result

Motion Test - 2

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Weekly Quiz Competition

Question 1
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Sunil and Rohit start at one end of a street, the origin and run to the other end, then head back. On the way back, Sunil is ahead of Rohit. Which statement is correct about the distances run and the displacements from the origin before reaching the origin?

A
Sunil has run a greater distance and his displacement is greater than Rohit's.

B
Rohit has run a greater distance and his displacement is greater than Sunil's.

C
Sunil has run a greater distance but his displacement is lesser than Rohit's.

D
Rohit has run a greater distance but his displacement is lesser than Sunil's.

Solution

Before reaching origin, distance travelled by Sunil is more than Rahul since he is ahead of Rohit. But displacement of Rohit is more; as he is far from the origin than Sunil.
Question 2
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Smoke particles from a chimney shows:

A
Random or irregular motion

B
Circular motion only

C
Linear motion only

D
Rotational motion only

Solution

According to the question the correct option will be ‘A’ because Smoke particles from the chimney have velocities in different direction and thus they exhibit random or irregular motion.
Question 3
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Reciprocal of frequency is known as-

A
Time period

B
Amplitude

C
Intensity

D
None

Solution

According to the question the correct option will be ‘A’ because The reciprocal of frequency is its time period.
Question 4
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Type of motion of an object that moves in a straight line is called-

A
Rectilinear motion

B
Periodic motion

C
Circular motion

D
None of the above

Solution

According to the question the correct option will be ‘A’ because Rectilinear motion is another name for straight line motion.

Ex: a train moving on a track.
Question 5
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A simple harmonic is -

A
Rotation of earth around the sun

B
Rotation of earth about its own axis

C
Revolving motion of a top

D
Motion of oscillating liquid column in U-tube

Solution

According to the question the correct option will be ‘D’ because Simple harmonic motion is a special type of periodic motion, in which a particle moves to and fro repeatedly about a mean position. So, motion of oscillating liquid column in U-tube is simple harmonic.
Question 6
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When a body is at rest, this is called-

A
Principle of conservation of energy

B
Newton's first law

C
Ohm's law

D
Newton's second law

Solution

According to the question the correct option will be ‘B’ because Newton's first law states that; "An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force”. Thus, body continues in its state of rest as there is no external force on it,
Question 7
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A student writes the equation of an angular SHM as π/3=π/6sin(ωt). Is this correct?

A
This equation is correct as it is of the form θ=ϕsin(ωt)

B
This equation is incorrect as instantaneous angular displacement is more than the angular amplitude

C
This equation is incorrect as the equation lacks a phase factor

D
This equation is correct since the SHM has a sin factor in it

Solution

Let the General equation of SHM x = A sin(ωt+ϕ), Where x is displacement from the mid position and A is amplitude of SHM.

⇒ −A ≤ x ≤ A,

Now in the question, π/3 / π6 = sin (ωt)

Since instantaneous angular displacement is more than the angular amplitude so this equation of SHM is incorrect.
Question 8
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what is not incorrect statement about impulse?

A
Change in velocity

B
Change in momentum due to force in small time

C
Change in acceleration

D
Change in speed

Solution

According to the question the correct option will be ‘B’ because Impulse:- It is defined as a change in momentum due to force in small time.

Mathematically,

From Newton's law,

F = △p/△t

Impulse, I = F × Δt = ΔP

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Re-Attempt Weekly Quiz Competition

Motion Test - 2

Result

Motion Test - 2

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SHARING IS CARING

Question 1

Sunil has run a greater distance and his displacement is greater than Rohit's.

Rohit has run a greater distance and his displacement is greater than Sunil's.

Sunil has run a greater distance but his displacement is lesser than Rohit's.

Rohit has run a greater distance but his displacement is lesser than Sunil's.

Solution

Question 2

Random or irregular motion

Circular motion only

Linear motion only

Rotational motion only

Solution

Question 3

Time period

Amplitude

Intensity

None

Solution

Question 4

Rectilinear motion

Periodic motion

Circular motion

None of the above

Solution

Question 5

Rotation of earth around the sun

Rotation of earth about its own axis

Revolving motion of a top

Motion of oscillating liquid column in U-tube

Solution

Question 6

Principle of conservation of energy

Newton's first law

Ohm's law

Newton's second law

Solution

Question 7

This equation is correct as it is of the form θ=ϕsin(ωt)

This equation is incorrect as instantaneous angular displacement is more than the angular amplitude

This equation is incorrect as the equation lacks a phase factor

This equation is correct since the SHM has a sin factor in it

Solution

Question 8

Change in velocity

Change in momentum due to force in small time

Change in acceleration

Change in speed

Solution

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