A plane landing on a small tropical island has just 63 m of runway on which to stop.If its initial speed is 61 m/s, what is the maximum acceleration of the plane during landing, assuming it to be constant? and please explain

Question

ganeshie8 · Answer

you can use the equation :

$v^2-u^2 = 2as$

anonymous · Answer

thanks really helped

ganeshie8 · Answer

yw !! did you get a = 61^2 / 2*63  ?

anonymous · Answer

yeah i did and another question how long does it take for the plane to stop with that acceleration? do i use a diffrent formula or ...

dumbcow · Answer

hmm don't forget "a" should be negative since plane is decelerating
for time, use velocity equation
v(t) = at + 61  ....set v=0 and solve for t

anonymous · Answer

ok thank i got -2.065573770488029

ganeshie8 · Answer

thats right, no -ve sign for time... its +2.0655

anonymous · Answer

yeah thanks

ganeshie8 · Answer

np.. :D