Free Mass & weight questions for IGCSE Physics (0625), part of Motion, forces & energy. Each question has the answer and the marking points an examiner would look for.
Generate a full Mass & Weight worksheet →All Motion, forces & energy questionsAn alloy is made by mixing equal masses of aluminium (density 2.7 g/cm³) and iron (density 7.9 g/cm³). There is no change in total volume on mixing.
What is the density of the alloy?
Answer: B
Which statement about mass and weight is correct?
Answer: C
A student has a rectangular metal block measuring 4.0 cm × 5.0 cm × 5.0 cm. Its mass is 450.0 g.
Calculate the volume of the block.
Calculate the density of the metal.
Use Table 3.1 to identify the metal.
| Metal | Density / g/cm³ |
|---|---|
| aluminium | 2.7 |
| titanium | 4.5 |
| iron | 7.9 |
| copper | 8.9 |
| lead | 11.3 |
Calculate the weight of the block. (g = 9.8 N/kg)
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | 100 cm³ 100 B1 | 1 |
| (b) | 4.5 g/cm³ ρ = m ÷ V C1 4.5 A1 | 2 |
| (c) | titanium titanium (ecf from (b)) B1 | 1 |
| (d) | 4.41 N W = mg with m in kg C1 4.41 A1 | 2 |
A spacecraft travels from the Earth to the Moon.
Explain why the weight of an astronaut changes during the journey but her mass does not.
Define gravitational field strength.
State the effect of the Earth’s gravitational field on an object.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | g changes; amount of matter same weight depends on the gravitational field strength, which changes B1 mass is the amount of matter, which does not change B1 | 2 |
| (b) | force per unit mass force per unit mass B1 | 1 |
| (c) | weight / force towards centre it exerts a force (weight) on it towards the centre of the Earth B1 | 1 |
A student uses a measuring cylinder and a balance to find the density of an irregular stone.
Describe how she finds the volume of the stone.
The stone has mass 156 g and volume 60 cm³. Calculate its density.
State whether the stone floats in water (density 1.0 g/cm³). Give a reason.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | displacement method Any 3 of: half fill a measuring cylinder with water and read the volume; lower the stone in fully; read the new volume; volume of stone = difference B3 | 3 |
| (b) | 2.6 g/cm³ ρ = m ÷ V C1 2.6 g/cm³ A1 | 2 |
| (c) | sinks; denser than water it sinks because its density is greater than that of water B1 | 1 |
A metal cube has sides of 4.0 cm. Its mass is 570 g.
Calculate the volume of the cube.
Calculate the density of the metal.
Convert your answer to kg/m³.
| Part | Answer and marking points | Marks |
|---|---|---|
| (a) | 64 cm³ 64 cm³ B1 | 1 |
| (b) | 8.9 g/cm³ ρ = m ÷ V C1 8.9 g/cm³ A1 | 2 |
| (c) | 8900 kg/m³ 8900 kg/m³ B1 | 1 |
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Meet Riyaz →Original Cambridge-style practice questions written for mentorriyaz.in. These are not Cambridge past paper questions, and this site is not affiliated with or endorsed by Cambridge University Press & Assessment. Updated 2026-11-04. Paper generator · mentorriyaz.in