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 remain suspended at its current depth.

It will sink to the bottom.

It will accelerate upwards towards the surface

It will move upwards at a constant velocity.

None

A siphon is used to move water from one bucket to another at a lower level. The flow will stop if…

the diameter of the tube is too large

the bend at the top of the siphon is perfectly horizontal

both buckets are placed in a vacuum.

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 greater than the atmospheric pressure.

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

The gas pressure is equal to the atmospheric pressure.

The gas pressure is less than the atmospheric pressure

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?

4000 N

8000 N

5 N

200 N

None

Why does atmospheric pressure decrease as altitude increases?

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

The force of gravity becomes significantly weaker at higher altitudes.

The percentage of oxygen in the air decreases with altitude.

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

None

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

Mercury does not evaporate at room temperature, unlike water.

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

Mercury is cheaper and more readily available than purified water.

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

None

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

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

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

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

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

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?

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

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

None

When a submarine takes on water into its ballast tanks, what is the effect on the forces acting on it?

The buoyant force increases because the submarine’s volume has increased.

Its total weight increases, causing it to become greater than the buoyant force, so it sinks.

Its total weight decreases, allowing it to sink faster.

The buoyant force decreases because the submarine becomes heavier.

None

10.

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

the high internal pressure required to keep the crew alive.

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

the extremely high external pressure of the deep ocean.

the buoyant force pushing the submersible to the surface.

None

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