State newton's third law of motion. derive the expression for second law of motion.
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Newton third law of motion is for every reaction there is equal and opposite reaction.
Derivation of newton second law of motion
F is directly proportional to mv-mu/t
F=km(v-u)t... k is a constant
F=kma.. v-u/t=a
Now take f= 1
1=k*1*1
So k=1
Now f=ma
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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.
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