Can I use this method for derivation of kynetic energy in class 9 exam
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Consider an object with mass m, moving with initial velocity u. Let a force F, act on it causing a displacement s, along the direction of force and accelaration. Let the object attain final velocity v.
We know F = m x a ------------------------ 1
By position velocity relation we have,
V2 = u2 + 2as or s = v2 -u2 / 2a ----------------------------- 2
The work done by the force
W = F x s -------------------------------------3
Substituting 1 and 2 in
3W = (m x a) x (v2 - u2/2a)
W = m/2 (v2 - u2)W
= 1/2 mv2 - 1/2 mu2 -------------------- 4
For an object to be at rest in the beggining, u = 0
Therefore,
W = 1/2 mv2
W = Ek ( Ek = kinetic energy)
Therefore, Ek = 1/2 mv2
Better to solve like this...
smrutidesai:
But can I solve with that method
Ohk...But this is more conclusive and informative...
Yes but shall I get marks for above method? is there any thing wrong ??
In terms of physics
Sryy...But after 3 lines I'm not able to understand what u have written
Answered by
0
yes you can use this method!!!!!!
it's your wish.
v(=∩_∩=)ﾌ
it's your wish.
v(=∩_∩=)ﾌ
Is there any tech error
this is my question
no !!!!! ?
Thk accept my request
where is your req?
Friend request
Ohh that was not friend request, it was following list
you can get help by your followers
or which you are following
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