Kuiz Fizik Tingkatan 5 Bab 2 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 2 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

An object with a weight of 20 N is fully submerged in a fluid. If the buoyant force acting on it is 25 N, what will be the subsequent motion of the object when released?

It will move upwards at a constant velocity.

It will accelerate upwards towards the surface

It will remain suspended at its current depth.

It will sink to the bottom.

None

Which of the following factors does NOT influence the pressure at a specific depth within a static liquid?

The acceleration due to gravity (g).

The density of the liquid.

The depth below the surface of the liquid.

The shape of the container holding the liquid

None

In a hydraulic jack, a force of 200 N is applied to an input piston with a cross-sectional area of 0.02 m2. If the output piston has a cross-sectional area of 0.8 m2, what is the maximum load (force) that the jack can lift?

200 N

5 N

8000 N

4000 N

None

Why does atmospheric pressure decrease as altitude increases?

The percentage of oxygen in the air decreases with altitude.

The force of gravity becomes significantly weaker at higher altitudes.

The air gets colder at higher altitudes, causing it to contract and exert less pressure.

There is a shorter and less dense column of air above, which exerts less weight.

None

A U-tube manometer is connected to a gas tank. The liquid in the manometer is pushed down on the gas tank side and is 40 cm higher on the side open to the atmosphere. What can be concluded about the gas pressure?

The gas pressure is less than the atmospheric pressure

The gas pressure is greater than the atmospheric pressure.

The gas pressure is equal to the atmospheric pressure.

The gas pressure is equal to the pressure exerted by the 40 cm liquid column.

None

A dam is constructed to be much thicker at its base than at its top. What is the primary physical principle that explains this design choice?

The total volume of water in the reservoir determines the force on the dam wall.

Liquid pressure is directly proportional to depth, so the force exerted by the water is greatest at the base.

Atmospheric pressure combined with water pressure is greatest at the bottom.

The density of water increases with depth, requiring stronger support.

None

What is the primary reason mercury is used in barometers and manometers instead of water, despite its toxicity?

Mercury is a metal and conducts electricity, which is needed for the device to work.

Mercury is cheaper and more readily available than purified water.

Mercury is significantly denser, allowing for instruments of a practical, manageable height.

Mercury does not evaporate at room temperature, unlike water.

None

A diver is at a depth of 30 m in a freshwater lake. What is the approximate gauge pressure they experience? (Use density of fresh water ρ=1000 kg m−3 and g=9.8 m s−2).

101 kPa

394 kPa

29.4 kPa

294 kPa

None

How does the aerofoil shape of an airplane wing generate lift according to Bernoulli's principle?

Air travels slower over the curved top surface, creating a region of higher pressure that pushes the wing up.

The wing pushes air downwards, resulting in an equal and opposite reaction force pushing the wing upwards.

The engines create a vacuum above the wings which pulls the aircraft into the air.

Air travels faster over the curved top surface, creating a region of lower pressure compared to the bottom surface.

None

10.

Deep-sea submersibles are built with thick, rounded hulls, typically made of steel or titanium. This design is primarily to withstand…

the extremely low temperatures found at the bottom of the ocean.

the buoyant force pushing the submersible to the surface.

the high internal pressure required to keep the crew alive.

the extremely high external pressure of the deep ocean.

None

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