Posted by **MSM** on Saturday, September 20, 2008 at 10:56am.

Q: a freely falling object requires 1.50s to travel the last 30.0m before it hits the ground . From what height above the ground did it fall ??

Pleazzzz help ....

- physical -
**drwls**, Saturday, September 20, 2008 at 11:09am
Let H be the height from which it is dropped. Let T be the time it takes to hit the ground. Solve these two simultaneous equations:

H = (1/2) g T^2

H-30 = (1/2) g (T-1.5)^2

By subtracting equations, H can be eliminated immediately:

30 = 1.5 g T - (1/2) g (1.5)^2

Solve for T first, then compute H.

- physical -
**Diana**, Wednesday, November 11, 2015 at 7:49pm
t= 2.79 H=38.1

## Answer this Question

## Related Questions

- physics - A certain freely falling object requires 1.25 s to travel the last 35....
- Physics - A certain freely falling object requires 1.50 seconds to travel the ...
- physics - A certain freely failing object requires 1.70 s to travel the last 39....
- Physics - A certain freely failing object requires 1.70 s to travel the last 20....
- physics - An object is dropped from a height H above the ground. This free-...
- physics - An object is dropped from a height H above the ground. This free-...
- Physics - It takes a freely falling object 1.80 s to travel the last 32.00 m ...
- Physical Science - A 15 Kg object that is free falling has a total mechanical ...
- physices - an object is falling freely from rest of height of 65m above the ...
- maths - A body of mass 11kg falls freely from rest from a height of 15m above ...

More Related Questions