Question paper
Chapter 3 Practice Paper
30 marks · 40 min · 4 pages
5 multiple-choice questions and structured questions with answer lines. Chapter 3 (contact and non-contact forces, mass vs weight with W = mg, density = m/V, pressure = F/A).
Chapter 3G2 / G3
Sec 3 Combined Science (Physics) Force & Pressure topical questions
12 exam-style questions (61 marks) in three tiers. Try each one on paper first, then check the model answer and mark scheme.
Chapter 3 notes12 questions · 61 marks
Showing 12 of 12 questions
Foundation
Recall and simple application
- Q1Foundation[4 marks]
Classify each as a contact or non-contact force: friction, gravity, tension, magnetism.
- Q2Foundation[4 marks]
State the SI unit of (a) mass, (b) weight, (c) density, (d) pressure.
- Q3Foundation[2 marks]
Calculate the weight of a 4.0 kg school bag near the Earth's surface (g = 10 N/kg).
- Q4Foundation[2 marks]
A block has volume 50 cm³ and density 2.4 g/cm³. Calculate its mass.
Standard
Structured, exam-style
- Q5Standard[4 marks]
An astronaut of mass 80 kg travels to a planet where g = 4.0 N/kg. (a) Calculate the astronaut's weight there. (b) State the mass there, with a reason. (c) Calculate what the astronaut weighs back on Earth.
- Q6Standard[5 marks]
A glass marble has radius 0.60 cm and density 2.5 g/cm³. (a) The marble's volume is about 0.90 cm³. Calculate its mass. (b) State and explain whether it floats in water.
- Q7Standard[4 marks]
A filing cabinet weighs 900 N and stands on four feet, each of area 25 cm². (a) Convert the total foot area to m². (b) Calculate the pressure on the floor.
Challenging
Data, evaluation and explanation
- Q8Challenging[8 marks]
A rectangular storage tank base measures 2.0 m × 1.5 m. The empty tank has mass 30 kg; it is filled with 3.0 m³ of water (density 1000 kg/m³). (a) Calculate the mass of water. (b) Calculate the total weight on the ground. (c) Calculate the pressure on the ground.
- Q9Challenging[6 marks]
A 60 kg teacher stands first on two feet (total area 0.030 m²), then on a skateboard whose four wheels contact 0.0012 m² in total. (a) Calculate both pressures. (b) State and explain which situation dents a wooden floor more easily.
- Q10Challenging[7 marks]
A student claims: "Heavier objects always sink; lighter objects always float." Evaluate this claim using density. Include one worked counterexample with numbers.
- Q11Challenging[7 marks]
A metal cube of side 2.0 cm has mass 64 g. (a) Calculate its volume and density in g/cm³. (b) Express the density in kg/m³. (c) Calculate the pressure it exerts resting on a face, in Pa (g = 10 N/kg).
- Q12Challenging[8 marks]
Two identical bricks lie on sand: one flat on its largest face, one standing on its smallest face. (a) State which leaves a deeper dent and why. (b) The brick weighs 32 N; its faces measure 24 cm × 12 cm and 12 cm × 12 cm. Calculate both pressures. (c) State one everyday use of the principle shown.
Next step
Sit the practice paper
A 30-mark paper set out like a school paper, with a separate mark scheme. Give yourself 40 min.
Mark scheme
PROChapter 3 Practice Paper — mark scheme
Answers · Marking points · 2 pages
Model answers with a mark for each creditworthy point — for marking at home or in class.