Chapter-3 Mass Weight and Density — Online MCQ Test
PHYSICS · Grade 10 · IGCSE cambridge
Practice Chapter-3 Mass Weight and Density with a free chapter-wise online MCQ test.
This chapter covers: The difference between mass and weight and determining the density of solids and liquids..
AI-generated questions from basic to board-exam level, with instant results and explanations.
Chapter-3 Mass Weight and Density — Important Questions & Answers
Which of the following best defines mass?
- A. The force exerted on an object due to gravity
- B. The amount of matter contained in an object
- C. The weight of an object measured in newtons
- D. The volume of space occupied by an object
Answer: B. The amount of matter contained in an object
Mass is a fundamental property that measures the amount of matter in an object, independent of gravitational field. Weight, by contrast, is the gravitational force acting on that mass.
Mass is a fundamental property that measures the amount of matter in an object, independent of gravitational field. Weight, by contrast, is the gravitational force acting on that mass.
What is the SI unit of weight?
- A. Kilogram (kg)
- B. Newton (N)
- C. Gram (g)
- D. Pascal (Pa)
Answer: B. Newton (N)
Weight is a force and is measured in newtons (N). Mass is measured in kilograms, which is a different quantity.
Weight is a force and is measured in newtons (N). Mass is measured in kilograms, which is a different quantity.
An astronaut has a mass of 80 kg on Earth. What will be her mass on the Moon?
- A. 80 kg
- B. 13.2 kg
- C. 480 kg
- D. Zero
Answer: A. 80 kg
Mass is an intrinsic property of matter and does not change with location. The astronaut's mass remains 80 kg on the Moon; only her weight would be different.
Mass is an intrinsic property of matter and does not change with location. The astronaut's mass remains 80 kg on the Moon; only her weight would be different.
The gravitational field strength on Jupiter is approximately 25 m/s², compared to Earth's 10 m/s². If an object has a mass of 20 kg, which statement is true?
- A. The object is heavier on Earth than on Jupiter
- B. The object's mass increases on Jupiter
- C. The object weighs 500 N on Jupiter and 200 N on Earth
- D. The object becomes denser on Jupiter
Answer: C. The object weighs 500 N on Jupiter and 200 N on Earth
Weight on Jupiter = 20 × 25 = 500 N; weight on Earth = 20 × 10 = 200 N. Mass remains constant, but weight changes with gravitational field strength.
Weight on Jupiter = 20 × 25 = 500 N; weight on Earth = 20 × 10 = 200 N. Mass remains constant, but weight changes with gravitational field strength.
A metallic sphere of radius 5 cm has a mass of 5.24 kg. If the density of the metal is 8400 kg/m³, which of the following best explains any discrepancy?
- A. The sphere must be hollow or contain a cavity inside
- B. The measurement of radius is incorrect
- C. The density value for the metal is wrong
- D. The mass measurement instrument is faulty
Answer: A. The sphere must be hollow or contain a cavity inside
Expected mass = ρ × V = 8400 × (4/3)π(0.05)³ ≈ 44 kg, which is much greater than 5.24 kg. The discrepancy suggests the sphere is not solid but contains internal voids.
Expected mass = ρ × V = 8400 × (4/3)π(0.05)³ ≈ 44 kg, which is much greater than 5.24 kg. The discrepancy suggests the sphere is not solid but contains internal voids.