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Question (11)

QN0031278

A toy train moves around a circular track and completes one round every minute. Its motion is

(A) only linear
(B) only oscillatory
(C) circular and periodic
(D) linear and oscillatory

Correct Answer: C

Explanation:

The train moves along a circular path and repeats its motion at equal intervals, so it is circular and periodic.

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Question (12)

QN0031279

A measuring tape shows a reading of 1.75 m. What is this length in millimetres?

(A) 175 mm
(B) 1750 mm
(C) 17,500 mm
(D) 1,750,000 mm

Correct Answer: B

Explanation:

1.75 m = 175 cm = 1750 mm.

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Question (13)

QN0031280

While measuring a pencil, a student's eye is placed to the left of the pencil tip instead of directly above it. This may cause

(A) no error
(B) parallax error
(C) increase in pencil length
(D) damage to the scale

Correct Answer: B

Explanation:

Incorrect eye position causes parallax error and leads to inaccurate readings.

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Question (14)

QN0031281

A child drops an orange from a tree. The orange mainly exhibits

(A) circular motion
(B) oscillatory motion
(C) linear motion
(D) periodic motion

Correct Answer: C

Explanation:

A falling object moves approximately along a straight line, showing linear motion.

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Question (15)

QN0031282

A student records the length of a pen as "14". Which important information is missing?

(A) Number
(B) Colour of pen
(C) Unit of measurement
(D) Material of pen

Correct Answer: C

Explanation:

Every measurement must contain both a numerical value and a unit.

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Question (16)

QN0031283

A school ground is 120 m long. Express this length in kilometres.

(A) 0.012 km
(B) 0.12 km
(C) 1.2 km
(D) 12 km

Correct Answer: B

Explanation:

Since 1 km = 1000 m, 120 m = 120 ÷ 1000 = 0.12 km.

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Question (17)

QN0031284

Two friends are standing at different houses and comparing distances to a playground. Their answers differ because they are using different

(A) scales
(B) units
(C) reference points
(D) measuring tapes

Correct Answer: C

Explanation:

Distances measured from different reference points can give different results.

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Question (18)

QN0031285

An eraser tied to a string is whirled in a circle. If the string suddenly breaks, the eraser will initially move

(A) along a straight line
(B) in another circle
(C) to and fro
(D) vertically downward only

Correct Answer: A

Explanation:

When the string breaks, the eraser initially moves along a straight-line path.

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Question (19)

QN0031286

Which of the following objects is most appropriately measured in millimetres?

(A) Length of a classroom
(B) Distance between cities
(C) Thickness of a coin
(D) Height of a tree

Correct Answer: C

Explanation:

Very small lengths such as the thickness of a coin are conveniently measured in millimetres.

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Question (20)

QN0031287

A swing completes 20 to-and-fro motions in equal intervals of time. This motion is

(A) linear only
(B) oscillatory and periodic
(C) circular only
(D) neither oscillatory nor periodic

Correct Answer: B

Explanation:

A swing moves to and fro repeatedly after equal intervals of time, so its motion is oscillatory and periodic.

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Question (11)

A toy train moves around a circular track and completes one round every minute. Its motion is

Explanation:

Link:

Question (12)

A measuring tape shows a reading of 1.75 m. What is this length in millimetres?

Explanation:

Link:

Question (13)

While measuring a pencil, a student's eye is placed to the left of the pencil tip instead of directly above it. This may cause

Explanation:

Link:

Question (14)

A child drops an orange from a tree. The orange mainly exhibits

Explanation:

Link:

Question (15)

A student records the length of a pen as "14". Which important information is missing?

Explanation:

Link:

Question (16)

A school ground is 120 m long. Express this length in kilometres.

Explanation:

Link:

Question (17)

Two friends are standing at different houses and comparing distances to a playground. Their answers differ because they are using different

Explanation:

Link:

Question (18)

An eraser tied to a string is whirled in a circle. If the string suddenly breaks, the eraser will initially move

Explanation:

Link:

Question (19)

Which of the following objects is most appropriately measured in millimetres?

Explanation:

Link:

Question (20)

A swing completes 20 to-and-fro motions in equal intervals of time. This motion is

Explanation:

Link:

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