What is the displacement of the wrench?

[jeahomgrajan]

Homework Statement

a worker drops a wrench from top of building under construction. if g =9.8N/kg [down], after 7 seconds, what is the displacement of the wrench?

Homework Equations

The Attempt at a Solution

i don't know the formula, totally lost

 

[Tedjn]

What is the physical interpretation of g? Does g ever change during the fall? After answering those questions, you should be able to see if any of your four kinematic equations can help you. Let us know if you need any more help.