u = √v2−2Egm
u = √v2m−2Eg4
u = √v−2Egm
u = √2v2Egm
Correct answer is A
E = m2g(v2 - u2)
multiply both sides by 2g
2Eg = 2g (M2g(V2−U2)
2Eg = m(V2 - U2)
2Eg - mV2 - mU2
mU2 = mV2 - 2Eg
divide both sides by m
mU2m=mV2−2Egm
U2 = mV2−2Egm
= mV2m−2Egm
U2 = V2 - 2Egm
U = √V2−2Egm
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