Pressure

If the thrust acting on a surface decreases, then the pressure _____.

Smaller the area on which a force acts, _____ (larger/smaller) is the effect of force.

Skis have a large surface in order to reduce the pressure on snow.

Pressure is independent of the roughness of the surfaces in contact.

Wooden sleepers are placed under railway tracks in order to increase pressure on the ground.

Pressure is inversely proportional to the force applied.

An object exerts a pressure of $2 \mathrm{Pa}$ on the ground. If another object of the same weight is kept above it, then the net pressure will become _____.

The straps and handles of travel bags are made broad to _____ the pressure on our shoulders.

If the force acting on an area is increased, the pressure will _____.

Pressure is directly proportional to _____.

The SI unit of pressure is _____.

Army tanks are provided with caterpillar tracks under their wheels in order to

What is the value of one pascal?

What is the pressure exerted by a body of weight $200 \mathrm{N}$acting on an area of $5 {\mathrm{m}}^2$?

When the nozzle of a syringe is dipped in a liquid and its piston is withdrawn, the liquid pushes up into the syringe. Give reason.

Explain why the wall of a dam is made thicker at the bottom.

Explain in brief why birds that walk on the leaves floating on the surface of the water have wide feet.

A motorcycle weighs $1200 \mathrm{N}$. If the pressure exerted by one of its tyre is $120 \mathrm{Pa}$, then find the area of the tyre in contact with the road.

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

Why do the pillars of a bridge have a broader base than the top?