Density, upthrust and viscous drag Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. A block has a mass of 540 g and a volume of 200 cm³. What is its density?
- A. 2.7 × 10³ kg m⁻³
- B. 2.7 × 10⁻³ kg m⁻³
- C. 3.7 × 10⁻¹ kg m⁻³
- D. 1.1 × 10⁵ kg m⁻³
2. A fully submerged object displaces 2.0 × 10⁻³ m³ of water of density 1000 kg m⁻³. What is the upthrust?
- A. 2.0 N
- B. 20 N
- C. 2000 N
- D. 0.20 N
3. What is the unit of viscosity?
- A. N m⁻²
- B. kg m⁻³
- C. Pa s
- D. N s
4. Which condition is NOT required for Stokes' law to apply?
- A. The object is a small sphere
- B. The flow is laminar
- C. The speed is low
- D. The liquid is cold
5. A ball falls at constant terminal velocity in oil. Which statement is correct?
- A. Weight = upthrust + viscous drag
- B. Weight = viscous drag only
- C. Upthrust = viscous drag
- D. The resultant force is upwards