# Free fall can somone help me

ok how would i go about solving this an what equations do i use

[SFHS99 2.P.40.] A worker drops a wrench from the top of a tower 89.0 m tall. With what velocity does the wrench strike the ground? (Assume the positive direction is upward.)
wrong check mark m/s

i have to use this webassign thing to do my assingments and i have limited tries to get them right thats why im asking for help thanks alot that is just one of many but they are all like that

Do you know the equation $$v_f^2=v_o^2+2ax$$ where x is the distance traveled? You have probably seen equation already. If you dont know it, refer to your physics book to see how it was derived and then memorize the equation.