# Physics Homework Help (acceleration & velocity)

Kiwi
Hello,

I was wondering if anyone could help me with the following question:

How long does it take for a shoe to drop 75 m from rest? What is the final velocity?

I have that the acceleration is equal to gravity at -9.8 m/s squared and that the distance is 75 m and the intial velocity is zero but I can't get much further than that. Thanks very very much for your time! ## Answers and Replies

Homework Helper
Kiwi said:
Hello,

I was wondering if anyone could help me with the following question:

How long does it take for a shoe to drop 75 m from rest? What is the final velocity?

I have that the acceleration is equal to gravity at -9.8 m/s squared and that the distance is 75 m and the intial velocity is zero but I can't get much further than that. Thanks very very much for your time! Look up kinematic equations

Gold Member
y = 75 - 4.9t^2.
Solve for y = 0.

Homework Helper
We're all waiting for the other shoe to drop! (Sorry - couldn't resist!)

BTW - I think air drag will be an important factor in this one but I'm sure your textbook isn't interested in that complication.

Last edited:
h8ter
Yea, in most High School Physics text, air resistance is neglected.

Sjuckett848
ya just use the equation mentioned above and you should be able to get the right awnser. 