- #1
Misr
- 385
- 0
Hello People actually i want to make sure of this explanation
The external force acting on the rocket is zero
Therefore : F = mdv/dt+vdm/dt=0
Therefore mdv/dt=-vdm/dt=Fimp(Impulse force or thrust force)
Well I have an explanation for this but I'm not sure about it
The external force is zero according to Newton's third law
Mdv/dt is the reaction of the rocket on thrust force because the mass of the rocket is constant
Vdm/dt is the force acting on the rocket and mass is variable bec. The mass of gasses varies from time to time.
Since these forces are equal in magnitude and opposite in direction
Therefore the sum of them is zero
So is this explanation right?
The external force acting on the rocket is zero
Therefore : F = mdv/dt+vdm/dt=0
Therefore mdv/dt=-vdm/dt=Fimp(Impulse force or thrust force)
Well I have an explanation for this but I'm not sure about it
The external force is zero according to Newton's third law
Mdv/dt is the reaction of the rocket on thrust force because the mass of the rocket is constant
Vdm/dt is the force acting on the rocket and mass is variable bec. The mass of gasses varies from time to time.
Since these forces are equal in magnitude and opposite in direction
Therefore the sum of them is zero
So is this explanation right?