Thursday

November 20, 2014

November 20, 2014

Posted by **mary** on Wednesday, September 26, 2012 at 10:50pm.

At low altitudes, the altitude of a parachute and time in the air are linearly related. A jump at 2,880 ft use the US army T-10 parachute system last 120 sec.

(A) find a linear model relating altitude a (in feet) and time in the air t (in seconds)

(B) the rate of descent is the speed at which the jumper falls. What is the rate of descent for a T-10 system?

- algebra -
**Steve**, Thursday, September 27, 2012 at 11:03amif time at altitude x is y, then

y = ax+b

Now, b=0, since a jump from 0 feet takes 0 time. So,

y = ax

120 = 2880a

a = 120/2880 = 12/288 = 1/24

y = x/24

the speed is thus ft/s = x/y = 24 ft/s

- algebra -
**mary**, Thursday, September 27, 2012 at 9:13pmThank you

**Answer this Question**

**Related Questions**

algebra - making linear equation from word problem An airspeed indicator on ...

MATH - Aircraft are landing and taking off on parallel runways at a busy airport...

Algebra - A word processing station was purchased by a company for $10,000. ...

physics - Estimate the speed of the parachutist descending at the constant ...

math,algebra - I have to make a word problem with a real life situation that ...

Algebra - in that equation I have to solve for x. 5. x^3 + 2x^2 - 9x = 18 in ...

9th grade - Use the following Info. At sea level the speed of sound in air is ...

physics - Estimate the speed of the parachutist descending at the constant ...

math - A pair of skydivers jump out airplane 5.5km above the ground. The ...

alegbra - If v1,...,v4 are in R^4 and v3 is not a linear combination of v1, v2, ...