Monday

October 20, 2014

October 20, 2014

Posted by **Nancy** on Tuesday, December 8, 2009 at 11:43pm.

i need the formula cause the one i have doesnt work cause i need time

- Calculus -
**Reiny**, Wednesday, December 9, 2009 at 12:11amvel = at where t is in hrs, and a is in miles/hrs^2

then s = (1/2)at^2 where s is the distance in miles

when v = 160

at=160

t = 160/a

when s= .7

(1/2)a(160/a)^2 = .7

a = 18285.7 miles/hrs^2

so what time is liftoff?

160 = 18285t

t = .00875 hrs or 31.5 seconds

check:

at t= 0,

v = 0

s = 0

when t = .00875

v = 18285.7(.00875) = 160

s = (1/2)(18285.7)(.00875)^2 = .699999

**Answer this Question**

**Related Questions**

trig - A plane is flying with an airspeed of 150 miles per hour and heading 155...

math hw - 42. Twenty minutes after a plane leaves the airport, it is reported to...

Please Anyone!!! - Plane A is 40 mi south and 100 mi east of Plane B. Plane A is...

Math - Plane A is 40 mi south and 100 mi east of Plane B. Plane A is flying 2 ...

Algebra 2 - 1. Plane A is 40 mi south and 100 mi east of Plane B. Plane A is ...

physics - An airplane starts from rest and moves forward with a constant ...

calculus - Two commercial airplanes are flying at an altitude of 40,000 ft ...

physics - A ball starts from rest and accelerates at 0.520 m/s2 while moving ...

math - Ten minutes after a plane leaves the airport, it is reported that the ...

Algebra - If a plane can travel 500 miles per hour with the wind 400 miles per ...