CBSE Class 9 Answered
I DID NOT UNDERSTOOD THE SECOND & THIRD EQUATION OF MOTION.Pls Help.
Asked by dencyk | 18 May, 2010, 04:01: PM
Expert Answer
Dear student,
Please go through this derivation, if you are still with more doubts, please get back to us.
Second equation of motion:
From equations (1) and (2)
The first equation of motion is v = u + at.
Substituting the value of v in equation (3), we get
3rd equation of motion:
The first equation of motion is v = u + at.
v - u = at ... (1)
From equation (2) and equation (3) we get,
Multiplying equation (1) and equation (4) we get,
(v - u) (v + u) = 2aS
[We make use of the identity a2 - b2 = (a + b) (a - b)]
v2 - u2 = 2aS
Hope this helps.
Team
Topperlearning.com
Answered by | 19 May, 2010, 12:52: PM
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