Question

Pl, obtain Newton's Third Law of Motion from The Second Law of Motion.

Answer 1

Consider an isolated system of two bodies A & B mutually interacting with each other, provided there is no external force acting on the system. 

Let FAB, be the force exerted on body B by body A and FBA be the force exerted by body B on A.
 
Suppose that due to these forces FAB and FBA, dp1/dt and dp2/dt be the rate of the change of momentum of these bodies respectively. 

Then, FBA =  d p 1 dt     ---------- (i) 
     => FAB =   d p 2 dt     ---------- (ii) 

Adding equations (i) and (ii), we get, 
FBA + FAB =   d p 1 dt +   d p 2 dt  

⇒ FBA + FAB = d( p 1 + p 2 ) dt     

If  no external force acts on the system, then 

d( p 1 + p 2 ) dt      = 0

⇒ FBA + FAB = 0
⇒ FBA = - FAB---------- (iii) 

the above equation (iii) represents the Newton's third law of motion (i.e., for every action there is equal and opposite reaction)...

hope this answer helps!!!

Answer 2

Explanation:

above answer is correct

this answer is extra information

☞Rockets can propel themselves through the nothingness of space because of two fundamental laws of physics: Newton’s Third Law and the Conservation of Linear Momentum.

☞Both ideas are essential to understanding how nearly everything in the universe moves.

☞When an ice skater takes off from a dead stop, she digs her blade into the ice and the ice pushes back with an equal and opposite force, sending her gliding across the rink.

☞When a cannon is fired, the cannonball goes hurtling through the air while the cannon recoils backward in response.

☞Both of these principles stem from the same general idea: that the universe likes to keep everything in balance.