Thrust and Pressure

The S.I. unit of pressure is

The tip of a drawing pin has an area of $0.01 {\mathrm{mm}}^2$. The pressure exerted is $p\times {10}^9$, if a force of $20 \mathrm{N}$ is applied by it. Find the value of $p$.

_____ (pressure/thrust) force acting perpendicularly on any given surface area of a body.

When weight of a body is greater than buoyancy of liquid the body _____.

S.I. unit of pressure is _____ (pascal / newton).

_____ is defined as perpendicular force acting upon a surface.

Camel can walk more easily on sand than man. Why?

Why is it difficult to hold a bag having strap made of thin and strong string?

In which direction do fluids exert pressure?

Define one pascal.

How is thrust related to pressure?

State the SI unit of : thrust.

State the SI unit of : pressure.

Define thrust.

In which situation do we exert more pressure on ground while standing on both feet or on one foot? Justify your answer.

An iron cube of side $10$ cm is kept on a horizontal table. If density of iron is $3000 kg m^{-3}$, find pressure exerted on table by the cube.

Which will exert greater pressure : $100$ kg mass on $10 m^2$ or $50$ kg mass on $4 m^2$ ? Give reason.

Give reasons for the following : Railway tracks are laid over flat sleepers.

Give reasons for the following : Sharp knife can cut fruit more easily than a blunt knife.

State the meaning of one pascal. A boy of mass $40$ kg is standing on loose sand. If area of his feet is $0.04 m^2$, calculate the pressure exerted by boy on sand. $\left[Take g = 10 m{s}^{-2}\right]$.