Is there any way that Newton's second law can be derived from the

[Nstraw]

Is there any way that Newton's second law can be derived from the first

 

[Nstraw]

Note that I'm asking for 2nd law from first law not first from 2nd

 

[xAxis]

Is there any way that Newton's second law can be derived from the first

I don't think so. The first Newtons Law just states that body will continue to move in a streight line unifiormly unless force acts on it.
Second Law quantitatively describes how exactly the velocity changes under the influence of force.

 

[Nstraw]

Thanks. Well what do you think is the second law really the real law

 

[sankalpmittal]

Thanks. Well what do you think is the second law really the real law

Yup , we say that Newton's second law is real law of motion because Newton's first law and third law may be derived using his second law. However doing converse isn't possible.

So you cannot derive Newton's second law from the first. However doing converse is possible , i.e. first law can be derived from second law.

 

[truesearch]

Newton's first law states that an object will be either at rest or moving with constant velocity ( constant speed in a straight line) if there is no resultant ( unbalanced) force acting on it.
If there is a resultant force acting then the object cannot be at rest or moving with constant velocity which means that it must be accelerating.
So the first law tells you, qualitatively , that a resultant force causes acceleration.

 

[Nstraw]

I understand now. Thank you all