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AQA GCSE · Question 07.1 · Forces
A swimming pool is being filled with water. Calculate the weight of the water in the swimming pool when the mass of the water is 25 000 kg.
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gravitational field strength = 9.8 N/kg
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Use the equation:
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weight = mass × gravitational field strength
A swimming pool is being filled with water. Calculate the weight of the water in the swimming pool when the mass of the water is 25 000 kg.
<br>
gravitational field strength = 9.8 N/kg
<br><br>
Use the equation:
<br>
weight = mass × gravitational field strength
How to approach this question
1. Identify the values for mass and gravitational field strength from the question.
2. Substitute these values into the given equation.
3. Calculate the result and include the correct units for weight.
Full Answer
weight = 25 000 kg × 9.8 N/kg
weight = 245 000 N
The question provides the equation: weight = mass × gravitational field strength.
The values are given as:
mass = 25 000 kg
gravitational field strength (g) = 9.8 N/kg
Substitute the values into the equation:
Weight = 25 000 × 9.8
Weight = 245 000 N
The unit for weight (which is a force) is Newtons (N).
Common mistakes
✗ Mixing up mass and weight.\n✗ Forgetting the units (N).\n✗ Calculation error.
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