Question

Check the correctness of the formula v²= u²+2as

Answer 1

v ka square minus u ka square is equals to 2 as

Answer 2

v2 = u2 + 2as

This equation can be proved as follows:

v = u + at therefore t = (v-u)/a but s = ut + ½ at2 and so

s = ut + ½ a([v-u]/a)2

therefore:

2s = 2u(v-u)/a + (v2 – 2uv + u2)/a

So:

2as = 2uv – 2u2 + v2 – 2uv + u2

and

so

v2 = u2 + 2as