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WorksheetsPressure and Upthrust
Total questions: 20
Worksheet time: 17mins
Which two forces act on an object in water?
gravity
friction
weight
upthrust
What happens if the weight of an object is equal to or less than the upthrust?
It floats
It sinks
It spins
It explodes!
What is the scientific word for 'floating'
levitating
suspended
buoyancy
hovering
What happens if the weight of an object is greater than the upthrust?
it floats
it sinks
it bounces
it vibrates
Where would you find the largest pressure?
At the bottom of the ocean
At the top of Mt Everest
Close to ground in Cuckfield
In a rockpool on the Great Barrier Reef
1 Pa = 1N/m2
When you increase your depth under water, the water pressure on your body
increases
decreases
stays the same
A 20N weight is hung from a spring balance which reads 17N when it is completely submerged in water. What is the upthrust of the body of water?
37N
20N
17N
3N
Diagram shows a U-tube filled with two liquids, X and Y which are immiscible. The heights of the liquid columns of X and Y from level P are 8 cm and 4 cm respectively. Which of the following statements is true?
The density of X is less than the density of Y.
The liquid pressure is higher in column X than in column Y at level P.
The densities of liquids X and Y are equal.
A submarine has a surface area of 300 m2.
The density of sea water is 1050 kg m–3.
At what depth under the sea, will the additionalpressure on the submarine be 5 × 105 Pa?
[Take g = 10 N kg–1]
47.62 m
67.62 m
87.62 m
57.62 m
The figure below shows a reservoir on a hill. The reservoir supplies water to a water tank on a tall building.
Calculate the water pressure at X.
(Density of water = 1000 kg m–3)
1.4×109 Nm–2
1.4×102 Nm–2
1.4×105 Nm–2
1.4×108 Nm–2
An object weighing 30 N displaces a volume of water with a weight 20 N. What will the object do?
It will sink
It will float
It will fly
None of these answers
Which physical quantity will increase when the diver dives deeper?
