Force acting on an object perpendicular to surface is called thrust
It is net force acting in a particular direction
It is always perpendicular to surface on which force applied
Example
When we stand on loose sand,our body is exerting force on sand by our feet
Surface of Sand is horizontal but our feet is standing vertically on it
It can be seen that our feet are applying force perpendicular to surface area
This force is called thrust
Example 2
When we fix a poster to bulletin board
We fix a pin to it
It can be seen that bulletin board is vertically placed
we apply force in perpendicular direction by pressing pin to it
This force is called thrust
What is formula of thrust?
Since thrust is also a force
Its formula is same as force
Thrust = Mass × Acceleration = m × a = m × g
Since it is a force,its SI Unit is also Newtons
Force = Mass × Acceleration
F = m × a
Acceleration due to gravity is denoted by g,So formula becomes
F = m × g
Since thrust is also a force,we can also write that
Thrust = f = m × g
