Why is the edge of the nails made sharp?
Edge of nails is made sharp(less area) so that the object experiences more pressure. This makes easier for a person to penetrate the wood with the force of a hammer.
What do you mean by pressure?
Pressure is the force acting on a unit area of a surface.
Mathematically, it is given by
=
Why do camels have broad feet?
Camels have broad feet i.e., feet having a large are so that the pressure exerted on the sand is less due to their heavy weight.
We know that,
Pressure =
Therefore, camels do not dig deep in the sand dunes and can move freely.
How can we increase the pressure by exerting same force?
Mathematically, pressure is given by,
Pressure =
Pressure can be increased by decreasing the area of the surface on which force is to be applied.