gv−t2gt2
gt2gv−t2
v1t2−1g
gvt2−g
Correct answer is B
t = √v1f+1g
t2 = v1f+1g
= vfgftg
1f+1g = vt2
= (g + f)t2 = vfg
gt2 = vfg - ft2
gt2 = f(vg - t2)
f = gt2gv−t2
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