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Figure 8 shows some water in a tank - Edexcel - GCSE Physics - Question 4 - 2021 - Paper 1
Question 4
Figure 8 shows some water in a tank. (i) The bottom of the tank has an area of 0.80 m². The force on the bottom of the tank, due to the water, is 2400 N: Calculate ... show full transcript
Worked Solution & Example Answer:Figure 8 shows some water in a tank - Edexcel - GCSE Physics - Question 4 - 2021 - Paper 1
Step 1
Calculate the pressure, due to the water, on the bottom of the tank.
Answer
To calculate the pressure, we use the formula:
Where:
- is the pressure,
- is the force (2400 N),
- is the area (0.80 m²).
Substituting the values:
Thus, the pressure on the bottom of the tank due to the water is 3000 Pa.
Step 2
Explain how the pressure on the bottom of the tank changes when more water is added to the tank.
Answer
When more water is added to the tank, the depth of the water increases. As the depth increases, the weight of the water above the bottom of the tank also increases, which leads to a greater force acting on the bottom surface. Since pressure is defined as force per unit area, the increase in force results in an increase in pressure on the bottom of the tank.
Therefore, the pressure on the bottom of the tank increases as more water is added.