Kuiz Fizik Tingkatan 5 Bab 2 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 2 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

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?

5 N

8000 N

200 N

4000 N

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 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.

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.

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

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

None

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

The density of the liquid.

The acceleration due to gravity (g).

The shape of the container holding the liquid

The depth below the surface of the liquid.

None

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

the buoyant force pushing the submersible to the surface.

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

the extremely high external pressure of the deep ocean.

the high internal pressure required to keep the crew alive.

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.

The buoyant force decreases because the submarine becomes heavier.

Its total weight decreases, allowing it to sink faster.

None

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 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.

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

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

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

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).

29.4 kPa

294 kPa

394 kPa

101 kPa

None

10.

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

the bend at the top of the siphon is perfectly horizontal

the diameter of the tube is too large

both buckets are placed in a vacuum.

None

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