a) s=ut + 1/2 at2Firstly , take the ut to the left hand side of the equation in order to isolate the 1/2 at2.s-ut=1/2 at2 Then multiply both sides by 2 to leave just at2 on the right hand side.2s-2ut=at2Finally divide both sides by t2 to leave just a on the right hand side.a=(2s-2ut)/t2
b) Firstly, minus 1/2 at2 from both sides to leave just ut on the right hand side.s-1/2 at2=utThen divide both sides by t in order to get only u on the right hand side.(s-1/2 at2)/t =uThis can also be written as u=s/t - 1/2 at
c) Use the equation a= (2s-2ut)/t2Substitute in valuesa=(2(10)-2(4)(2))/(2)2a=(20-16)/4a=4/4a=1