Question

Show that Newton's second law of motion is real law of motion.

Answer 1

Other laws of Newton can be derived from Newton's second law. Hence it is called real law of Newton

For eg…

2nd law is…F=ma

And 1st law is …initial velocity=final velocity

Assume that force acting on body is zero

F=ma

so…0= ma

0/m = a

0=a

0= (v-u)/t

0/t = v-u

0= v-u

U=v

Thus ….we proved that 1st law can be derived from 2nd law of Newton

Answer 2

Explanation:

☞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.