In which of these cases is the maximum pressure applied to the surface? -the person is standing on the ground -the car is driving along the road -the dense fabric is pierced with an awl -the iron tube is hammered into the ground
In the cases given in our example, the area of application of the force will play a decisive role in assessing the maximum pressure.
The pressure force formula looks like p = F / S, where p is the pressure (unit of measurement – Pa (pascal) or N / m2), F – force (unit of measurement – N (Newton)), S – area to which this force is applied (m²).
A person who pierces a dense fabric with an awl can develop an effort, say, up to a hundred newtons.
But the area to which he applies the force is so small (the tip of the awl, touching the fabric, forms a spot in hundredths of a square millimeter) that when converted to the dimension of N / m², the pressure can reach hundreds of millions of Pa and more (!). (For example, p = F / S – 100 N / 0.00000001 m² = 10 billion Pa!).
Therefore, the correct answer would be: the maximum pressure in the above cases will be at the awl piercing the fabric.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.