Question

please answer number.29

Answer 1

Third equation of motion

proof :-
as we know
v= u + at
v^2 = ( u + at )^2
v^2= u^2 + 2.u.at + a^2 . t^2 { squaring on both sides}
v^2 = u^2 + 2a ( ut + 1/2 at^2)
{ as s= ut + 1/2 at^2}

v^2 = u^ 2 + 2as
so,
v^2 - u^2 = 2as
hence proved