Home » Ask Physics » Thrust and Pressure: Increasing pressure by decreasing Area

Subscribe to Blog via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 3,066 other subscribers

Archives

Thrust and Pressure: Increasing pressure by decreasing Area

Share with:


Thrust is defined as the force acting normal to a surface. Pressure is the thrust acting per unit area.

P=F/A

The equation suggests that the pressure is inversely proportional to area. We can increase the pressure for a given force by decreasing the area. Here are some examples.

Cutting Tools

Cutting tools have sharp edges with very low area so that high pressure

can be applied by a small force. You can realise this if you try to cut a tomato with a blunt knife and try again after sharpening it.

Nails and Drawing Pins

Nails and pins have sharp ends so that it can pierce into wooden boards and walls easily by applying a small force.

In a Karate Punch

 

In martial arts, the normal punch is executed in such a way that only two knuckles are hitting the target so that maximum pressure can be imparted.

If the entire flat portion of the fist is used, the pressure will be very much less and the opponent will not be hurt much. Punch is only just one of the many attacks in Karate. You can analyse the various attacks and blocks with a view to find the application of pressure in it.

TRY to find out more examples where we decrease area to increase pressure.

Ask a Doubt

Post your Physics Doubts here

Name (required)

Email (required)

Subject

Message/Doubt/Question

Upload a file if required

askphysics@Twitter

Half Yearly Exam Count Down

Half Yearly Exam Count Down KVS Ernakulam RegionOctober 17th, 2017
The Half Yearly Examination for Kendriya Vidyalayas of Kerala starts from 17 October 2017
%d bloggers like this: