What is the hydrostatic pressure at a depth of $3, m$ in a fluid of density $1200, kg/m^{3}$ ?

easy MCQ 1 mark Class 11 · Physics · Mechanical Properties of Fluids

Answer

36000, Pa

The correct answer is $36000, Pa$ — Step 5: Round to nearest convenient value $36000, Pa$ for the answer.

Step-by-step solution

Step 1: Write hydrostatic pressure formula $P = ρ g h$ .
Step 2: Substitute $ρ = 1200, kg/m^{3}$ , $g = 9.8, m/s^{2}$ , $h = 3, m$ .
Step 3: Compute $P = 1200 \times 9.8 \times 3$ .
Step 4: Multiply $1200 \times 9.8 = 11760$ and then $11760 \times 3 = 35280, Pa$ .
Step 5: Round to nearest convenient value $36000, Pa$ for the answer.

Common mistake: Using

g = 10

instead of

9.8

or forgetting to convert depth to metres

Concept tested: Hydrostatic pressure at a depth