Friday

July 25, 2014

July 25, 2014

Posted by **Anonymous** on Thursday, September 6, 2012 at 12:11am.

- engineering -
**Henry**, Friday, September 7, 2012 at 7:13pmV^2 = Vo^2 + 2g*d.

V^2 = 0 + 19.6*39 = 764.4

V = 27.65 m/s.

d = Vo*t + 0.5g*t^2 = 30 m.

27.65t + 4.9t^2 = 30

4.9t^2 + 27.65t - 30 = 0

Use Quadratic Formula and get:

Tf = 0.931 s. = Fall time.

**Related Questions**

physics - An object starts falling under gravity from rest. If it completes 9/25...

Calculus - A particle moves in a straight line under a force such that its ...

physcis ! HELP !!!! - which of collowing situations describe a particle that ...

physics - which of collowing situations describe a particle that might have a ...

calculus - 5. A particle moves along the y – axis with velocity given by v(t)=...

science(physics) - a ball of mass 8kg falls from rest from a height of 100m ...

middle school math - A brick is dropped from the Empire State Building at a ...

Algebra I - The distance an object falls is directly propotional to the square ...

PHYS HELP - Water ﬂows over a section of Niagara Falls at a rate of 1.43...

calculus - A particle moves in a straight line under a force such that its ...