Worksheets › Class 11 › Mechanical Properties of Fluids
Class 11 Mechanical Properties of Fluids worksheet
CBSE Physics. Pressure, Pascal's law, continuity, Bernoulli, viscosity, surface tension. Every sheet has 20 questions in three sections and an answer key, and the numbers change every time.
Sample questions
Real questions from this chapter, as the app sets them. Tap Answer to see the answer and working.
Section A · multiple choice
- 1.
The total (absolute) pressure at a depth of 8 m in water is (atmospheric pressure 1.0 × 10⁵ N/m², g = 10 m/s²):
- 8 × 10⁵ N/m²
- 8 × 10⁴ N/m²
- 8 × 10³ N/m²
- 1.8 × 10⁵ N/m²
Answer
(d) 1.8 × 10⁵ N/m²
p = p₀ + ρgh
- 2.
In a hydraulic lift, the small piston has diameter 5 cm and the large one 23 cm. A force of 160 N on the small piston can lift a load of:
- 736 N
- 7.56 N
- 3,385.6 N
- 6,771.2 N
Answer
(c) 3,385.6 N
F₂ = F₁ × A₂/A₁ = F₁(d₂/d₁)²
- 3.
Water flows at 2 m/s through a pipe of diameter 5 cm into a pipe of diameter 1 cm. Its speed in the second pipe is:
- 2 m/s
- 10 m/s
- 50 m/s
- 0.08 m/s
Answer
(c) 50 m/s
A₁v₁ = A₂v₂
Section B · short answer
- 4.
Find the gauge pressure and the total pressure at a depth of 48 m in a lake. (Atmospheric pressure 1.0 × 10⁵ N/m², density of water 1000 kg/m³, g = 10 m/s²)
Answer
4.8 × 10⁵ N/m²; 5.8 × 10⁵ N/m²
gauge = ρgh; total = p₀ + ρgh
- 5.
A car of mass 1000 kg rests on the large piston (diameter 19 cm) of a hydraulic lift. What force on the small piston (diameter 4 cm) will hold it up? (Take g = 10 m/s².)
Answer
443.21 N
F₁ = mg × (d₁/d₂)²
Section C · long answer
- 6.
A metal ball of radius 4 mm and density 11300 kg/m³ falls through a liquid of density 1000 kg/m³ and viscosity 0.1 Pa s. Find its terminal velocity. (Take g = 10 m/s².) (2 decimal places where needed.)
Answer
3.66 m/s
vₜ = 2r²(ρ − σ)g/(9η)
Fresh sheets for your child
In the app, every Mechanical Properties of Fluids sheet is new: the app remembers the questions your child has already had and leaves them out. Print the sheet as a PDF, or use notebook mode and write the answers in a notebook.
Coming soon for Android and iPhone.