Loading [MathJax]/jax/output/HTML-CSS/jax.js
Home / Aptitude Tests / Mathematics / Make u the subject o...
Make u the subject of formula, E = m2g(v2<...

Make u the subject of formula, E = m2g(v2 - u2)

A.

u = v22Egm

B.

u = v2m2Eg4

C.

u = v2Egm

D.

u = 2v2Egm

Correct answer is A

E = m2g(v2 - u2)

multiply both sides by 2g

2Eg = 2g (M2g(V2U2)

2Eg = m(V2 - U2)

2Eg - mV2 - mU2

mU2 = mV2 - 2Eg

divide both sides by m

mU2m=mV22Egm

U2 = mV22Egm

= mV2m2Egm

U2 = V2 - 2Egm

U = V22Egm