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Question (1)

QN0028936

A force of 800 N acts on an area of 20 m². Calculate the pressure produced.

(A) 20 Pa
(B) 40 Pa
(C) 60 Pa
(D) 80 Pa

Correct Answer: B

Explanation:

Pressure = Force ÷ Area = 800 ÷ 20 = 40 Pa

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Question (2)

QN0028937

Why does a porter place a cloth ring on the head while carrying heavy luggage?

(A) To increase force
(B) To reduce pressure by increasing area
(C) To reduce mass of luggage
(D) To increase friction

Correct Answer: B

Explanation:

Larger area reduces pressure on the head.

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Question (3)

QN0028938

During a storm, roofs may blow off because:

(A) Pressure above the roof becomes higher
(B) Pressure inside the house becomes lower
(C) Pressure above the roof becomes lower than inside
(D) Gravity stops acting

Correct Answer: C

Explanation:

Fast-moving winds create low pressure above the roof.

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Question (4)

QN0028939

A pressure of 150 Pa acts over an area of 12 m². Find the force produced.

(A) 180 N
(B) 900 N
(C) 1200 N
(D) 1800 N

Correct Answer: D

Explanation:

Force = Pressure × Area = 150 × 12 = 1800 N

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Question (5)

QN0028940

Which instrument is commonly used for cyclone forecasting?

(A) Thermometer
(B) Satellite
(C) Microscope
(D) Bar magnet

Correct Answer: B

Explanation:

Satellites help track cyclone movement and intensity.

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Question (6)

QN0028941

A person hears thunder 7 s after seeing lightning. If speed of sound is 340 m/s, how far away is the lightning?

(A) 680 m
(B) 1360 m
(C) 2040 m
(D) 2380 m

Correct Answer: D

Explanation:

Distance = 340 × 7 = 2380 m

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Question (7)

QN0028942

Which type of pressure is exerted by air around us?

(A) Magnetic pressure
(B) Atmospheric pressure
(C) Water pressure
(D) Electric pressure

Correct Answer: B

Explanation:

Air surrounding Earth exerts atmospheric pressure.

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Question (8)

QN0028943

A nail pierces wood more easily than a blunt rod because the nail:

(A) Has greater mass
(B) Exerts less force
(C) Has smaller contact area producing greater pressure
(D) Has lower density

Correct Answer: C

Explanation:

Smaller area increases pressure.

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Question (9)

QN0028944

A cyclone wind exerts a force of 5400 N on a wall area of 18 m². Find the pressure.

(A) 150 Pa
(B) 200 Pa
(C) 300 Pa
(D) 400 Pa

Correct Answer: C

Explanation:

Pressure = 5400 ÷ 18 = 300 Pa

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Question (10)

QN0028945

Which cloud is mainly associated with thunderstorms?

(A) Cirrus
(B) Stratus
(C) Cumulonimbus
(D) Nimbus only

Correct Answer: C

Explanation:

Thunderstorms usually develop in cumulonimbus clouds.

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Question (1)

A force of 800 N acts on an area of 20 m². Calculate the pressure produced.

Explanation:

Link:

Question (2)

Why does a porter place a cloth ring on the head while carrying heavy luggage?

Explanation:

Link:

Question (3)

During a storm, roofs may blow off because:

Explanation:

Link:

Question (4)

A pressure of 150 Pa acts over an area of 12 m². Find the force produced.

Explanation:

Link:

Question (5)

Which instrument is commonly used for cyclone forecasting?

Explanation:

Link:

Question (6)

A person hears thunder 7 s after seeing lightning. If speed of sound is 340 m/s, how far away is the lightning?

Explanation:

Link:

Question (7)

Which type of pressure is exerted by air around us?

Explanation:

Link:

Question (8)

A nail pierces wood more easily than a blunt rod because the nail:

Explanation:

Link:

Question (9)

A cyclone wind exerts a force of 5400 N on a wall area of 18 m². Find the pressure.

Explanation:

Link:

Question (10)

Which cloud is mainly associated with thunderstorms?

Explanation:

Link:

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