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Mechanical Properties Of Fluids

Question

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Explain why a parachute is invariably used, while jumping from an aeroplane.

Solution

The parachute during descending, through air experiences very large viscous force due to large structure. The large structure of the parachute leads to a greater air resistance and hence a tendency to reach a slower terminal velocity. Therefore a person landing on ground will get very little hurt.

Some More Questions From Mechanical Properties of Fluids Chapter

What is an ideal liquid?

Do liquids exert pressure?

Define pressure.

What is the direction of pressure?

What is the direction in which pressure exerts force on the walls of a container?

What is the SI unit of pressure?

You have two identical glass flasks. One is open mouthed and other is filled with helium and sealed. Which of the two will weigh more?

A cylinder of length l and area of cross section a is filled with liquid of density ρ to a height h. What is the pressure at the bottom due to height column of liquid?

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