Question

Using dimensions, check the correctness of the following physical equations.
(i) $v = u + at$
(ii) $s = ut+\frac{1}{2}at^2$
(iii) $v^{2} =u^{2} +2as$
(iv)$T=\frac{\pi}{8} \frac{pr^{4} }{nl}$

Answer 1

a=v-u÷t

at =v-u

v=at+u

average velocity =u+v/2

s=average velocity *time

s=u+v/2*t

s=u+at+u/2*t

s=2ut+at^/2

s=ut+1/2at^