Force and Press...

Porters (coolies) place a round piece of cloth on their heads, to ______ the area of contact of the load with their head.

A $$1.5m$$ wide by $$2.5m$$ long water bed weighs $$1025N$$. Find the pressure that the water bed exerts on the floor. Assume that the entire lower surface of the bed makes contact with the floor.

Which of the following is NOT true?

A mountain climber experiences a nose bleed due to:

If we apply the brakes to a moving car, it comes to rest. This shows that force can make a moving object go slower.

A contact force cannot act through

The foundations of high rise building are kept wide so that they exert less pressure on the ground and prevent the building from sinking into the ground.

(a) A force of $$200\;N$$ acts on an area of $$0.02\;m^2$$. Find the pressure in Pascal.
(b) What force will exert a pressure of $$50,000\ Pa$$ on an area of $$0.5\;m^2$$?
(c) Find out the area of a body which experiences a pressure of $$500\ Pa$$ by a force of $$100\;N$$.

Which of the following class of force is different from others?

Force divided by _______ is called pressure.