y is 2nd law of motion d real law of motion.how can v derive 1st and 3rd law from 2nd law of motion
Asked by | 5th Aug, 2008, 10:00: AM
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Newton's second law is the real law of motion, as it contains both , the 1st as well as 3'rd law.
1st law from 2nd law :
A/c to 2nd law , F = ma
If there is no external force, i.e. F= 0
then, ma= 0
which implies , a = 0 [ as mass can't be zero ]
Acceleration is zero only when :
(i) body is at rest ; OR
(ii) body is moving with a uniform speed .
Which is actually the 1st law of motion.
Answered by | 6th Aug, 2008, 04:05: PM
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