Saturday

December 20, 2014

December 20, 2014

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

Pleazzzz help ....

- physical -
**drwls**, Saturday, September 20, 2008 at 11:09amLet 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.

**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-...

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 ...

Physics - A 3 kg object falls from a height of 10 m. What is its velocity just ...

Physics - A 3 kg object falls from a height of 10 m. What is its velocity just ...