1 (a) Figure 1 shows an object under the surface of the sea - Edexcel - GCSE Physics - Question 1 - 2020 - Paper 1
Question 1
1 (a) Figure 1 shows an object under the surface of the sea.
(i) Which arrow shows where the pressure on the object is greatest?
A
B
C
D
(1)
(ii) F... show full transcript
Worked Solution & Example Answer:1 (a) Figure 1 shows an object under the surface of the sea - Edexcel - GCSE Physics - Question 1 - 2020 - Paper 1
Step 1
Which arrow shows where the pressure on the object is greatest?
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Answer
The correct answer is C. The pressure on the object is greatest at the deepest point, where pressure from the water above is highest due to the depth.
Step 2
What is the pressure due to the water on the top surface of block Y?
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Answer
The pressure on block Y is four times the pressure on block X. Given that area Y is four times bigger and both blocks are at the same height, the weight of the water above block Y creates a pressure that is four times greater.
Step 3
State the depth shown on the meter in Figure 3.
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Answer
The depth is measured in meters, depicted as the value on the meter. The unit for depth is meters.
Step 4
State how the pressure of the water on the diver changes as the diver swims down from the surface of the lake.
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Answer
As the diver swims down, the pressure exerted by the water increases due to the additional weight of the water above.
Step 5
State why the total pressure on the diver is greater than just the pressure due to the water above the diver.
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Answer
The total pressure on the diver includes not only the pressure from the water above but also the atmospheric pressure acting on the diver’s body at that depth.
Step 6
State two factors that affect the pressure of the atmosphere on the aeroplane as the aeroplane goes higher in the atmosphere.
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Answer
Two factors that affect atmospheric pressure are:
Height of the atmosphere above the aeroplane - as altitude increases, atmospheric pressure decreases.
Density of the atmosphere - the air gets thinner with increasing altitude, reducing air pressure.
